Material: Aluminum alloy with anodized finish + stainless steel Joint Pipe Diameter: 28MM/30MM/32MM This is a water temp joint pipe adapter kit, which comes with 2 durable radiator hose clamps. It is installed inline to radiator hose and the sensor screws to read the water temperature, so hazardous fluids can be kept out of the passenger compartment. By using this product, potential problems with vehicles can be diagnosed right away before they turn into mechanical problems down the road.