The wall inlet for Puzer central vacuum systems. White plastic material. includes the surface part (shown). Suitable for all our inlet starting and the handle starting central vacuum cleaner hoses. Two metal pins will trigger the vacuum cleaner with hose end metal ring or handle started. Pipe connection 42mm, distance between fixing holes cross over the opening of 60mm, fixing holes width and length 43mm. the total length of 105mm, maximum width of 85mm. hose connector diameter of 37-38mm.