Clear-Seal™ Grease-Free Inner Joints
By DWK - Wheaton Science Products![Clear-Seal™ Grease-Free Inner Joints](https://krackeler.com/tt/lg/graphics/0012/jpg/Inner.jpg)
These joints are formed from a unique wall tubing that is heavier than standard wall tubing for extra strength. They're manufactured from Wheaton 33® low extractable borosilicate glass (meets ASTM Type I Class A and USP Type I standards).