High-. Easy to install and . Superior quality and complete accessories. Correct connector, no cutting or splicing required. Name: Check Water Port Material: Plastic Fitment: For modified cars, tool cars, camping cars, RVs, ATVs, yachts and other places where water needs to be added or in the city. Installation : Select a location to open a 90mm diameter round hole, wall-mounted installation Opening size: diameter 90mm Water pipe diameter: 20.2mm Installation screw hole spacing 85mm; screw hole diameter 5mm Standard hose connector diameter 20.2mm, can be connected to most hoses on the market Material: plastic colour: black Package Contents: 1 x Check valve(with quick connector) 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.