Specification
Material: Butyl Rubber
Color: Grey
Outer Diameter: 12.5mm /0.49"(appr.)
Inner Diameter: 7.2mm /0.28"(appr.)

Features
1: Provide bottle a tight seal with this snap-on stopper
2: Material of durable butyl rubber, good heat stability.
3: Rubber Bottle Stoppers Self Healing Injection Ports.
4: Designed for a 13mm or 1/2 inch diameter hole opening.
5: Widely used for liquid culture, BRF Jars, Supplemented substrate jars, Grain Masters.

Package included
100 X Injection Ports