2 pack, 3/8" mnpt x 1/4" fnpt, reducer bushing, hose fitting, used to assemble new hoses or replace old fittings on hoses when reduction in pipe size is required, made of corrosion resistant brass, durable & flexible air hose fitting, 3/8" male x 1/4" female national pipe thread, reducer bushing are designed to accommodate 3/8" mnpt & 1/4" fnpt, quickly repair or add new air hose lines when needed.