... -100 Material:AISI304/AISI316L sanitary sight glass,stainless steel sight glass,sanitary clamp sight glass 1) Specification: 1"-4", DN25 ... standard: DIN,SMS,ISO,3A.etc3. Material: Stainless Steel,Stainless Steel material:AISI304/304L,AISI316L4. Usage: use for industry ... field of dairy products,food,beer, beverage,pharmacy,water treatment and ...