This three-hole microphone and jack housing provides an attractive cover for a Bose-style jack. The FAP 08-17 provides two standard 0.38-inch holes and one 0.5-inch Bose-style hole in the center.This FAP 08-17 jack housing is bare aluminum with no finish.One Bose style center hole measures 0.562 inches diameter and 0.5 inches across the flatsTwo standard 0.38-inch hole
