Screw Caps: Polyseal 38mm Oak Barrel Alternatives AG70 is the correct replacement

AG70 is the correct replacement gasket

3/4 inch in diameter

The effectiveness of sulfur dioxide as a preservative is also pH-dependent

This housing has thick walls for increased strength

Screw Caps: Polyseal 38mm Oak Barrel Alternatives AG70 is the correct replacementScrew Cap, Polyseal. 38mm. The 38mm size will fit standard threaded top glass gallon jugs. The polyseal screw caps are black. They have a flexible inner liner that can withstand repeated usage. These screw caps measure 1 cm in height. Screw caps are not usually considered to be as good as regular corks for long term storage, but are generally satisfactory for short term storage of up to a year. They offer the advantages of ease of use and lower price.