... Size:DN15-100 Material:AISI304/AISI316L sanitary sight glass,stainless steel sight glass,sanitary clamp sight glass1) Specification: 1"-4", ... standard: DIN,SMS,ISO,3A.etc3. Material: Stainless Steel,Stainless Steel material:AISI304/304L,AISI316L4. Usage: use for industry field ... or as per customers requirement sanitary Clamp stainless steel sight glass straight weleded thread four-way flanged union-type ...