Rubber Diaphragm 1)rubber or silicon 2)Temp. range:-20~80c 3)Best quality and service 4)used for Westfalia milking parlor Rubber Diaphragm1 ... . Material: Rubber or silicon2. Diameter: Φ 60mm3. With good heat,weather,ozone ... , China 8. used in flow meter of Westfalia milking system Rubber Diaphragm