Material grade: 304, 316L, Seal(Gasket): EPDM, SILICON, VITON, PTFE , Size range: 1/2",3/4",1", 1.5", 2", 2.5", 3", 4" , Hygienic sight glasses / sanitary flow indicators SHSD-SC04The sight glass/flow indicator is the most convenient way to visually monitoHygienic sight glasses / sanitary flow indicators The sight glass/flow indicator is the most convenient way to visually monitor & check the ...