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We accept small quantity order and samples are also available. Quality can be checked before order confirmation. Apart from Couplings, Borun also manufacture and supply other OCTG (超链接)products such as Seamless Casing Pipe, ERW Casing, Oil Tube, API Pup Joints., Drilling Pipe etc.
H40、J55、K55、N80-1、N80Q、L80、P110 API Couplings