Series 6A00 Deflagration Flame Arrestor, Concentric Version, ISO 16852 Certified; 1-1/2" End Conns, 4" Element, Explosion Group IIB; Max. Operating Pressure: 16 PSI Abs.;Max. Operating Temperature: '=< 140 Deg. F; 1.4571 (SST) Casing & Element Material, 1.4581 (SST) Rim Material; Fkm Gasket Material; Housing Material 1.4581 SST, ASME B16.5 150RF Flange Connection,;One G-1/2" Port On One Side Of The Housing; A4 SST Cap Screw Material; Without Temperature Sensor; SST Name Plate / English Type; No Additional SuRFace Coating