Hunting Boss Connection Tubing Coupling Boss Connection Tubing Coupling Standard API 5CT &API 5B Grade J55, K55, N80, L80, C90, T95, P110; Place of Origin Tianjin China Outer Diameter STC141.30mm/LTC141.30mm/BTC141.30mm Minimum Length STC165.10mm/LTC196.85mm/BTC231.78mm Weight(kg) STC4.66/LTC5.75/BTC5.85 Techniques Machining Head code Round Thread Type NUE, EUE, STC, LTC, BTC. Surface Whole phosphating, or inside phosphating and outside coating Packaging Details By carton, wooden case, wooden pallet, or by requirements of customer. Delivery Detail Shipped in 5 days after payment We would like to establish long term business with any reliable partner in the world . Any interesting or questions, pls don't hesitate to contace us . Waiting for your kindly reply . Thanks