Series 6A00 Deflagration Flame Arrestor, Concentric Version, ISO 16852 Certified; 10" Line Size, 20" Element, Explosion Group IIA1 (D1); Maximum Operating Pressure: 21.7 PSI absolute, Maximum Operating Temperature: =< 302F; 1.4571 Stainless Steel Element Material, 1.4581 Stainless Steel Casing And Rim Material; FKM/FEP Seamless Covered Gasket Material; Housing Material 1.4581 Stainless Steel, ASME 150 RF Flanged End Connections, One G-1/2" Port On One Side Of The Housing; A2 Stainless Steel Cap Screw Material; Without Temperature Sensor; Aluminum Name Plate / English Type; No Additional Surface Coating