Brass chrome plated shank and nipple 3-1/2″ long, bore ID 3/16″. Comes with a welded nipple, back nut and plastic collar. It requires a 1″ hole for installation. When set in place, the shank will only have from back of plastic collar to end of threaded shank 70mm of length to pass through your wall or fridge door, need to allow to do up the back brass locking nut. Suits our 5mm ID beer / gas line.