GPI Thread Finish: 20-400
Shell Material: Phenolic
Liner Material: PE Cone Lined
Cap Color: Black

Magnakoys 20-400 Polycone Continuous Thread Closure Black Caps Fits 1 and 2 Ounce Boston Round bottles with the perfect closure.

***See our images for a better explanation on how to fit caps to vials in finding the size cap you will need.


All orders ship same day if received before 3PM Eastern ~ After 3PM and it will ship next day.


Thank you for looking!!!