Brass. Hose I.D. x Male hose thread. Manufactured to include no more than 0.25% weighted average lead content on wetted surfaces. No. G20-141: Size: 1/2" barb x 3/4" MHT, Material: Brass No. G20-142: Size: 5/8" barb x 3/4" MHT, Material: Brass No. G20-143