Glass Stoppers

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

Hollow glass PYREX® stoppers are 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 allows the stopper to stand on its head, which frees the user's hand and minimizes potential contamination. This PYREX® stopper is interchangeable with other common flask stoppers and fits all standard labware of comparable Standard Taper size

Pennhead glass stoppers are used with flasks, mixing cylinders, separatory funnels, etc. Length of ground zone given below is for the outer member into which the stopper fits. Ground zone of stoppers is slightly longer. All stoppers are solid except [ST] stopper size 13. Designed from ASTM Specification E675.

This Bel-Art hollow glass stopper features a SAF-T-LINE® threaded polymethylpentene extracting nut above ground surface allows easy and safe removal of stopper from flask. Stoppers are designed to fit most common flasks and other types of laboratory glassware.