Brass C260 Seamless Round Tubing, 3/8" OD,0.317"ID, 0.029" Wall, 12" Length Round metal telescoping tubing for fitting into tubes of the next size up or down for weight or flow increase or reduction Brass C260 for corrosion resistance and formability for bending or flaring tubing Seamless construction for smoother interior flow and greater burst strength than welded tubing 1/2- to 3/4-hard temper to provide greater hardness than half-hard temper brass Meets ASTM B135 specifications for quality assurance