The Casica Vent Plugs are "Self-Venting" which means there is no need to open and close it. Featuring a premium vent screw, these are the highest quality vent plugs available and come with a lifetime warranty.
The Casica Glass-In Vent is designed to be installed prior to hotcoating and glassed over. Installation requires a 1" forster bit (preferred) or short-bit holesaw (similar to the FCS X2 holesaw).
Screw size: M12x1.0
Vent elements are not warranted for installation breakage. Click for Casica Vent Plug Installation Manual.