30mm Vial Stoppers
30mm VIAL STOPPERS - gray chlorobutyl 30mm vial stoppers that meet USP Class VI. For use on serum vials / serum bottles that have a 15mm hole opening and 30mm outer rim-to-rim diameter. usually used on 250mL and 500mL serum bottles.
![30mm Vial Stoppers for Serum Bottles](https://vgdrx.com/c/89-category_default/30mm-vial-stoppers.jpg)