Test Tube Cork Laboratory Grade

Top Diameter: 1/2 inch or 1.42 cm

Bottom Diameter: 3/8 inch or 1.06 cm

Length 3/4 inch or 1.9 cm

Ideal for sealing bottles, safe to use in the packaging and/or processing of food

This Item is punched from Natural wood Cork.

equivalent to Fischer Scientific stopper #3 07-782F

If you need a larger size:

https://www.ebay.com/itm/223735559766