PYREX® Barrelhead Glass Stoppers with [ST] Joint, Corning®

Hollow PYREX® Barrelhead stoppers have a standard taper joint and are closed at the bottom. Glass stoppers are interchangeable with standard taper joints and bottle stoppers of the same size. The hollow barrelhead stopper is light in weight, yet very strong to reduce chipping and breakage, thus minimizing replacement costs. A barrel-shaped head means it is easy to clean and even easier to rotate in or out. Grooves in the sides help prevent slippage. The flat top of these glass stoppers allows them to stand on their head, which frees the user's hand and minimizes potential contamination. This is the suggested replacement for Corning® item number 7620 series glass stoppers. Material: Borosilicate Glass Code 7740