Shop Deals
Shop By Category
Hello. Sign in Your Account
0 Cart
  • Your Shopping Cart is empty.
    Fill it with the best Art Glass supplies or gifts on the planet.

    If you already have an account, sign in. View Cart (0 items)
Inspire
Take $130 OFF the Taurus 3 Ring Saw - Ends Wed.
Take $130 OFF the Taurus 3 Ring Saw - Ends Wed.

Sealed End Clear Cylinder 10 Pack - 90 COE

Sealed End Clear Cylinder 10 Pack - 90 COE 200608_1 thumbnail image 200608_2 thumbnail image 200608_3 thumbnail image 200608_4 thumbnail image 200608_5 thumbnail image 200608_6 thumbnail image 200608_7 thumbnail image 200608_8 thumbnail image 200608_9 thumbnail image User Manual User Manual +
See all images and other media
Sealed End Clear Cylinder 10 Pack - 90 COE

Sealed End Clear Cylinder 10 Pack - 90 COE by Glaskolben

$74.95 USD
Item# 103100   Availability: Expected to be available June 24, 2026. Subject to change. Pre-order now!
Check Out Related Media
Art Glass TV

30 Day Money Back Guarantee

Easy Returns

Safe Shopping Guarantee

World Class Service

2,000+ Glass Colors & Styles

50 Years of Expertise

Product Features

  • Create blown glass bulbs with ease - perfect for a quick gift!
  • Eliminate the time consuming method of "pulling points" from glass tubes
  • 1mm wall, 28mm diameter before blowing
  • Includes 12 Silver Plated Caps and Loops for finishing
  • Sold in a pack of 10
  • 90 COE
200608_1 image
200608_2 image
200608_3 image
200608_4 image
200608_5 image
200608_6 image
200608_7 image
200608_8 image
200608_9 image

Product Description

Create Custom Blown Ornaments The Simple Way
Making custom glass ornaments is easy with Glaskolben pre-blown clear glass cylinders with blow pipe ends. Glaskolben may be blown freehand into a ball using a Hot Head torch (item# 7329) and MAPP gas, eliminating the time consuming method of "pulling points" from glass tubes. Roll hot cylinder into frit before blowing to decorate. 

Annealing temperature is 950° F. 1mm wall, 28mm diameter before blowing. 10 cylinder pack, includes instructions and 12 silver plated caps and loops. 90 COE compatible.

For more information, see the User Manual under additional images to download an illustrated step-by-step guide, or watch our quick online video.

Delphi Tips:

  • Rotate the Glaskolben constantly in one direction while heating.
  • Use two hands if needed to stabilize your project in the flame while rotating to prevent wobbling into and out of the flame.
  • The tip of the Glaskolben has more mass and will take longer to heat to a softened state, concentrate heat there and periodically move the center into the flame to heat evenly.
  • Begin by blowing firmly, but be prepared to reduce pressure quickly if needed to prevent over-stretching soft glass.
  • Keep your Glaskolben level to prevent accent glass from gathering only at the tip or from pouring into the pipe.
Safety Note: Do not tip the Glaskolben bulb above the blow pipe end while blowing or handling your hot bulb.

First grouping of ornaments created by artist Tia Collin, remaining ornaments by Val Oswalt-De Waard

Customers Who Bought This Item Also Bought

BOGO
item: 63818
item: 7406
BOGO
item: 425013
item: 54723
item: X200
Oceanside White Opal - 96 COE
Starting at $9.45
item: X100IFC

Customers Who Viewed This Item Also Viewed

item: 7329
item: 1032D
item: 2299
item: 1032
item: 425632
item: 103200
Scoring Knife
$29.95
item: 92803
item: B841857
item: 425704
item: 75526

Customer Reviews

4.5 out of 5 stars
5 star  
   5
4 star
   2
3 star
   1
2 star
   0
1 star
   0
See all 8 customer reviews
Write a customer review

Product Images from Customers

Be the first to share product images with other customers
[+] Add a Product Image
5 out of 5 stars
  •   Fantastic!
By on
Pros : Points already pulled. Very challenging to do this. 90 COE compatible with other great glass to fuse this with. Video is great but...
Cons : Video ideally would love to know how long you annealed and how do you complete this as an ornament.
Other Thoughts : Have tools on hand to cut warm/hot glass and use as components for future projects if ornament doesn't work out. Then glass is not wasted.
Was this review helpful to you?  
4 of 8 people found this review helpful
3 out of 5 stars
  •   On the fence
By on
Pros : Great concept and convenient for beginners
Cons : Harder than it looks and wasted a good bit of material trying to get the right technique
Was this review helpful to you?  
6 of 11 people found this review helpful
4 out of 5 stars
  •   Beautiful and challenging!
By on
Pros : The Glaskolben tubes are a fantastic way to make the most beautiful ornaments. Results after many failures have been stunning.
Cons : It’s my opinion the directions on use have a lot to be desired. They are incomplete. As it stand now a lot of trial and error is necessary to achieve positive results. We also need detailed information on working with colors, annealing, and additional tips for success. Also trouble shooting tips are needed.
Other Thoughts : More information on recycling is needed. At nearly $5 per “attempt” we need to know what/how failures can be recycled. This also includes using the blow tube. Heads up! You DO need the neodymium glasses for safety and to gauge the temperature of the glass before blowing.
Was this review helpful to you?  
9 of 14 people found this review helpful

See all 8 customer reviews
Related Content
How to Make Your Own Blown Glass Ornaments
Oct 01, 2011
GLASKOLBEN cylinders are pre-blown clear glass cylinders with blow pipe ends, used for blowing glass balls. Glaskolben cylinders are used throughout Europe for making Christmas tree ornaments. Glaskolben is a German word that translates to glass bulb. WATCHAVIDEOONBLOWINGGLASKOLBENORNAMENTS. SUPPLIES/EQUIPMENT Torch head for Mapp Gas use Gas/oxygen torch Glaskolben™ cylinder 90 COE frits and powders for decoration Ornament cap and loop set (available in gold or silver) COMPATIBILITY Glaskolben is compatible with Uroboros and Bullseye 90 COE glass frit and powders. Do not use any other COE as it may cause stress or fracture. HOWTOBLOWANORNAMENT 1. Light the torch and adjust the flame - a broader flame is better. Select a Sealed End Cylinder Glaskolben™ and introduce it into the back of the flame away from the torch. Rotate it as it is brought into the hotter area of the flame. Continue to rotate until the cylinder is glowing
Featured Artist: Kexin Wen
May 10, 2010
When and how did you get started in stained glass? Ive been interested in stained glass for as long as I can remember. As a child, I would sit in churches and watch the (often) biblical depictions come to life when a stray ray of sunlight cast its illumination our way. Sun shadows dancing. I dabbled in many media over the years, trying to find an outlet for some of the visions careening inside, but none of them took. Drawing, painting - even watercolours - no amount of professional training could guide my hand in a satisfactory way. But then there was the glass. I lived abroad for a few years, and wound my way through Europe on my way back to the States when I finished my Peace Corps Service. My last international destination was Paris, where one of my closest friends lives as an organist. Two beautiful autumn
Ring of Fire Artist Challenge Pushes the Limits of Creativity
May 03, 2010
Delphi Glass and ArtFire, the premier marketplace for handmade crafts, announce a new online art contest. The Ring of Fire Artist Challenge is open to all artisans. Entries are being accepted now. Contest ends June 30 and winners announced July 9, 2010. Following its annual festivities for National Art Glass Month, Delphi has organized another online event with the help of its partner ArtFire. The first annual Ring of Fire Artist Challenge is designed for all artisans of all crafts and abilities, inviting them to use common art supplies in new and creative ways. Artisans are asked to choose one or more items from the 10 products that make up the Ring of Fire. These items range from patterned dichroic glass and fine silver wire to mosaic tiles made entirely from recycled glass. Winners are chosen by popular vote and jury based on technical skill and creativity. A beginners category
See more related content

4 Stars and Above

item: 7329
item: 68711
item: 92803
1" Thick Fiber DuraBlanket
$13.95
3 for $11.85 ea
item: BFFRB
item: 103200
Scoring Knife
$29.95
item: 99712
item: 64227
Pebeo Glossy Paint Marker Set
$109.95 $76.95
31% off
item: B841857
item: 1032

You may also like

item: 97516T
item: 7335
Hot Head Bead Making Kit
$199.95 $173.95
$26.00 off
item: 6532
Delphi EZ-Pro 15-6 Kiln With Furniture Kit
$2,099.95 $1,799.95
15% off
item: 4322
item: 156304
item: 156303

Your Recent History

item: X11805
item: 94678
item: 85811
item: 452118
item: 4896D
item: 103100
item: 3000