Reseal, repair, or upgrade your airsoft pistol with this ASG parts kit. Pieces are compatible with Dan Wesson revolvers as well as CZ and STI pistols. Package includes: Part no. 7-11 small gasket O-ring, part no. 7-12 thin gasket O-ring, part no. 7-03 piercer seal, part no. 7-01 valve seal, part no. 1-27 valve seal.