2 pieces stainless steel water hammer arrestor for washing machine water supply valve or direct connection to washing machine pipe: 3/4 inch female swivel hose thread x 3/4 inch male hose thread; Maximum operating pressure: 250 PSI. Can be installed horizontally or vertically. Suppresses water shock and noise, protects washing machine control system. Low lead brass valve body. Material: Stainless steel. Color: Silver + gold. Package Contents: 2 x arrestor. Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. The measurement allowed error is +/- 1-3 cm.