BEST Fittings Quick Coupler starter kits offer a high quality cost effective, slim line solution enabling the quick and easy change over from one filling probe to another. Suitable for use on all PCP air rifles, Air Arms, Logun, Daystate, Weihrauch, Falcon, BSA to name a few, and all pistols having an industry standard 1/8 BSP threaded fill probe. Contains: 1 x BEST Fittings QC02 Coupler, 2 x Stainless QC03 Plugs. 1 x Stainless combined pressure test/dust plug. 2 x Bonded seal washers. Compatible with Daystate, Air Arms, Brocock, BSA, Falcon, Webley, and all 1/8 BSP fill probes and connectors.