Brass. Hose I.D. x Female hose thread. Manufactured to include no more than 0.25% weighted average lead content on wetted surfaces. No. G20-136: Size: 1/2" barb x 3/4" FHT, Material: Brass No. G20-137: Size: 5/8" barb x 3/4" FHT, Material: Brass No. G20-1