Series 6A00 Deflagration Flame Arrestor, Concentric Version, ISO 16852 Certified; 6" End Conns, 12" Element, Explosion Group IIA1 (D1); Max. Operating Pressure: 21.7 PSI Abs;Max. Operating Temperature: '=< 302 Deg. F; 1.4571 (SST) Casing & Element Material, 1.4581 (SST) Rim Material; FKM Gasket Material; Housing Material 1.4581 SST, En1092-1 PN10 Flange Connection,;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