... :AISI304, AISI316L Standard:DIN/SMS/ISO/3A/IDF sanitary straight sight glassMaterial:AISI304, AISI316LStandard:DIN/SMS/ISO/3A/IDFSpcification: 1/2 ... , cosmetic, chemical industrySeal ring: silicon, EPDM etcwe can supply this sight glass with clamp end, weld end and thread end connection