These NW KF-16 Plastic Cap Protectors are for KF-16 or KF-10 Fittings and Flanges. Please see below in our “Related” section for additional accessories that may benefit your vacuum applications and maintenance needs. We offer a large variety of vacuum pumps, chambers, fittings, hoses, gauges, sensors/transducers, repair kits, oil, filters and accessories for all your vacuum needs.