Retainer for D-Torch. The following Glass Expansion D-Torches can use this adaptor: ARCOS II EOP (30-808-3657), Blue EOP (501907034, 30-808-3600), Blue SOP (501907035, 30-808-3614) Blue TI (501907036, 30-808-3629).Glass Expansion is ISO 9001:2015 certified by AB Certification, No. AU4501-9001