QiiMii Stainless Sight Glass Tri Clamp End SUS304 Sanitary steel In-line Sight Glass (1 1/2", SS304) Material: Stainless Steel 304; Glass: Tempered Glass Gasket Between Glass and stainless: Silicon Max Operating Pressrure: 10bar Working Temp: -10-120 Size: 1.5" (50.5mm Flange OD)