Pup joint (1)standard: api 5ct (2)size: 2 3/8"-13 3/8" (3)grade: j55, k55, l80, n80.P110 (4type:stc, ltc, btc, eue, nue surface treatment:coating. Protection of thread:thread protector packing: in bundle, by wooden pallet or by steel strip or by the requirements of customer. Pup joints are used to adjust the height of full length tubing or casing strings. They are also used to adjust the depth of downhole tools. Pup joint sets are available in: integral premium thread box-by-pin pin-by-pin with couplings boxed separately pin-by-pin with couplings hand tight pin-by-coupling box flush joint connections Quality is our main competitive advantage The requirements and expectations of our customers must be satisfied Quality management is integrated into all our business processes Management is responsible and accountable for quality performance Quality performance must be assured throughout the supply chain system Excellence in quality management is necessary for successful business results.