Recommended for the suspension of fire extinguishing pipes and chilled water pipework. Material Steel Finish Electro galvanized 15 microns as per ASTM B 633. Max Temp. 650F (343 C) Certification UL Listed Compliance Manufacturers Standardization Society ANSIMSS SP-69 & SP-58 (Type 1) Federal Specification WW-H-171E & A-A-1192A (Type 1) *SS 304 316 can be manufactured on request *Hot Dipped Galvanized can be manufactured on request.