... 5CT 5B ISO9001,2008 Grade:J55,K55,N80-1,N80-Q,L80,C90,P110 Size:tubing1.9" ... 8" Product Name: Tubing Pup JointS (pipe fitting pup joint, pipe fitting)Standard Reference: API spec 5CTSize: ... From 2 3/8" to 4-1/2''Grade: J55, K55, N80-1, N80 ... Tons per yearOtherwise, Our company manufactures and sells casing and tubing couplings,pup joints, tool joints, ...