• Perfect for attaching an airlock to your kegmenter unit! • Pre - drilled 13/16' hole fits #3 stopper (FE410VS) like a charm. • Made of high - quality stainless steel for long - lasting use.

This 4 - inch stainless tri - clamp end cap is ideal for homebrewers and kegmenter users. You can use it to attach an airlock to your kegmenter unit, which helps maintain the right environment for your brewing. The pre - drilled hole measures 13/16', and it's designed to fit a #3 stopper (FE410VS). With its stainless - steel construction, it's durable and can serve you well for a long time.