SPG 1/4-5/32 is a model number of 1/4 x 5/32 inch stainless steel union straight reducer push-in air fittings, which can connect 1/4" O.D and 5/32" O.D tubing. Constructed of high grade 316 stainless steel, these durable union connector reducer push-in fittings provide a simple push-pull method of connecting pneumatic tubes and can hold a variety of tubing material including nylon, PU, PA, Teflon...