ITEM NAME:1 / 2 PT Socket Electric Water Boiler Safety Valve O2N7 1 / 2 PT Socket Electric Water Boiler Safety Valve O2N7 Product Name: Electric Water Heater Check Valve; for: electric water heater; Pressure: 0.75 mPa Color: red and silver Material: metal, plastic Weight: 78 G; External thread size: 20 mm / 1 / 2PT; Internal thread Diameter: 19 mm / 1 / 2PT Hole diameter: 4.5 mm; Total size: 45 x 25 x 61 mm (L * W * H) Package: 1 x Electric Water Heater Check Valve Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/-1-3cm..For: electric water heater;. Color: red and silver. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing.