#50AB-SL4 is a non oiled bearing made of copper alloy with HB>150 as the substrate, with drilled holes and embedded with water lubricant on its working surface. This product has excellent heat and corrosion resistance, and no low-temperature fragility phenomenon. It can be used at extremely low temperatures and is particularly suitable for use in seawater and rivers, such as ships, valves, turbines, water treatment, environmental engineering, etc.