Series 6A00 Deflagration Flame Arrestor, Concentric Version, ISO 16852 Certified; 4" End Conns, 8" Element, Explosion Group IIA (D); Max. Operating Pressure: 120 KPa Abs.;Max. Operating Temperature: '=< 60 Deg. C; 1.4571 (SST) Element Material, 1.4581 (SST) Casing & Rim Material; NBR Gasket Material; Housing Material 1.0619 Steel, ASME B16.5 150RF Flange Connection,;One G-1/2" Port On Each Side Of The Housing; 8.8 Zinc Plated Cap Screw Material; Without Temperature Sensor; Aluminum Name Plate / English Type; Signal Blue (Ral5005) Surface Coating