Application Widely: Pressure washer gauge has universal 3/8 inch quick connect. It connects between pressure washer pump and hose. Works with most of electric and gas pressure washer. Reading Easily: The scale of power washer gauge is clear, with a dual dial design. Reading is up to 6000 PSI. Quality material: Pressure washer gauge kit is made of stainless steel. High temperature and resistance. High precision: Gauge interior is filled with shock- glycerin to accurate readings. Colour: Silver Material: metal Package Contents: 4 x pressure washer gauge 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.