100Nb Sch40 Astm A53 Gr B Black Carbon Steelseamless Pipe , 100Nb Sch80 Astm A53 Gr B Blackcarbon Steel Seamless Pipe , 125Nb Sch80 Astm A53Gr B Black Carbon Steel Seamless Pipe , 125Nbsch120 Astm A53 Gr B Black Carbon Steel Seamlesspipe , 150Nb Sch40 Astm A53 Gr B Black Carbon Steelseamless Pipe , 150Nb Sch80 Astm A53 Gr B Blackcarbon Steel Seamless Pipe , 200Nb Sch80 Astm A53Gr B Black Carbon Steel Seamless Pipe , 250Nbsch120 Astm A53 Gr B Black Carbon Steel Seamlesspipe , 300Nb Sch80 Astm A 53 Gr B Black Carbon Steelerw Straight Pipe , 300Nb Sch120 Astm A 53 Gr Bblack Carbon Steel Erw Straight Pipe , 400Nb Sch120Astm A 53 Gr B Black Carbon Steel Erw Straight Pipe, 500Nb Sch160 Astm A 53 Gr B Black Carbon Steelerw Straight Pipe Quantity: 1080