Wika 1.5 type 131.11 100 psi gauge – 1/8 npt cbm stainless steel wika type 131.11 gauges feature 316 stainless steel wetted parts, a 304 stainless steel case, and a snap-in, acrylic window. When installation space is limited and stainless steel wetted parts are needed, wika type 131.11 is the best choice. The stainless steel construction also make these gauges ideal for harsh environments. specifications: connection location: center back mount wetted parts: stainless steel case material: stainless steel case filling: standard window type: removable snap-off window construction: polycarbonate