Series 7A00 Rev B Stable Detonation Flame Arrestor Without Restriction, Concentric Version, ISO 16852 Certified; 10" Line Size, 20" Element, Explosion Group IIA; Max. Operating Pressure: 16 PSI Abs, Max. Operating Temperature: =< 140 Deg. F; 1.4571 Stainless Steel Element, 1.4581 Stainless Steel Casing And Rim Material; NBR Gasket Material; Housing Material Steel, ASME 150 RF Flange Connection, Two G-1/2" Ports On Each Side Of The Housing; 8.8 Zinc Plated Cap Screw Material; Without Temperature Sensor; Aluminum Name Plate / English Type; No Paint (Carbon Steel-Zinc Or Stainless Steel); Signal Blue (RAL 5005) Surface Coating