These 180 degree return bend pipe fittings are widely used on water plumbing, air conditioner, heat pump system, hydraulics, and refrigeration system etc., they are good replacement for changing the direction of your copper pipeline. Specification Material: Copper Color: Copper Tone Inner Diameter: 19mm / 3/4" Total Length: 81mm / 3.19" Center distance: 60mm / 2.36" Wall thickness: 1.0mm Package List: 4 × Copper Pipe Fitting Advantage Copper pipe fittings are made of copper material, which has good thermal conductivity, corrosion resistance, easy welding, stable performance and long service life. The surface is smooth and no burrs. The 180 degree bend design helps to minimize the risk of leakage and increase the efficiency of your system. Instruction Cleaning the connection surface, and then soldering to install. NOTE Please confirm the inner diameter before ordering.