WannaBi Shower Flow Control Valve, 1/2" Brass Shower Flow Restrictor Reducer 1/2-inch Male IPS by 1/2-inch female IPS connections,fits most shower heads and shower arms BRASS Construction to ensure quality and longevity. Lever is made of brass,shut off water supply completely. Can be used as shut-off valve, water saving valve or pressure reducing valve. Simply attach the valve between the shower arm and head and turn the nozzle to reduce or increase the water flow.