Series 7A00 Rev B Stable Detonation Flame Arrestor Without Restriction, Concentric Version, ISO 16852 Certified; 1" Line Size, 2" Element, Explosion Group IIA; Max. Operating Pressure: 18.9 PSI Abs, Max. Operating Temperature: =< 140 Deg. F; 1.4571 Stainless Steel Element And Rim, 1.4581 Stainless Steel Casing Material; NBR Gasket Material; Housing Material 1.4581 Stainless Steel, NPT Connection, One G-1/2" Port On Each Side Of The Housing; A2 Stainless Steel Cap Screw Material; Without Temperature Sensor; Aluminum Name Plate / English Type; No Paint (Carbon Steel-Zinc Or Stainless Steel); No Additional Surface Coating