This product is a Twin Stage Propane Regulator with a dual 1.4M Btu capacity and 3/4" size. It is manufactured by KOSAN CAVAGNA GROUP and is designed for use with propane tanks. The product comes with a California Prop 65 Warning for Cancer & Reproductive harm. It is intended for use in outdoor heating, cooking, and eating applications, specifically as a replacement part for barbecues and grills.