Blackcat Airsoft Inlet Valve for WE GBB Mag/Grenade Cartridge (3pcs)

Blackcat Airsoft Inlet Valve for WE GBB Mag/Grenade Cartridge (3pcs) Metal made GBB pistol refill valves Suitable for WE Series Airsoft Gas Blow Back Magazine/ 40mm Grenade Cartridge Include 3 Piece Inlet Valve (M5 Screw thread)/ 3 Piece O-Ring (for hole diameter 7,5-8mm)