Valve Cover Breather Clamp On 3/4"(19mm) Id Neck Black Top Red Element (Ref K&N 62-1560). The filter is 30mm tall, 35mm in outside diameter with a 19mm (3/4 inch) flange which is designed to clamp directly on to metal or plastic tubing. This air filter is constructed with non-woven synthetic filter media so it can be cleaned and reused repeatedly.