The Fermzilla Yellow O-ring, with a 4-inch diameter, is designed to perfectly fit Gen 3 Pressure lids and 2-inch TC Pressure Lids, ensuring a reliable airtight seal for your fermentation vessels.

Crafted for durability and effective pressure maintenance, this gasket helps prevent leaks, maintaining optimal conditions for your brewing process. Ideal for replacing worn seals, it supports consistent fermentation performance and preserves the integrity of your setup.

Suitable for any 19L, 9.5L and 2L Corny Keg in either ball lock or pin lock.

What is Low2?
Low2 O-Rings are the new golden yellow standard of homebrew kegs. Because of their unique composition (Synthetic M-Class and Cross-Linked Elastomers), they have superior oxygen barrier properties than that of the previus O-Rings (Silicone). This results in your beverage staying fresher for longer.