Precision check valve
Fermentation gases can escape easily by pushing the ball up, but air is blocked from flowing in the reverse direction
For use with Better Bottle Fermenters

Technical Details

Product Details

Package Dimensions
Width : 0.5 inch
Height : 0.4 inch
Length : 3.8 inch

Shipping Weight: 0.32 ounce (View shipping rates and policies)

ASIN : B0064ODQQG