Pipe King round hole steel strainer and combination hose nipple set. The round hole steel strainer and nipple can be used with all standard suction hoses. They are both plated steel with standard straight pipe threads. The strainer helps prevent debris from entering a suction line. The steel combination nipple is recommended for low pressure discharge and suction service for liquids. The shank side of the nipple will only connect into the suction hose. Clamps are recommended for a secure fit.