API 5CT 5-1/2" Btc Casing Coupling J55 K55 L80 N80 P110 Grade

API 5CT 5-1/2" Btc Casing Coupling J55 K55 L80 N80 P110 Grade. We are factory and China Top 10 line pipe manufacturer. We are based in Shandong, China, start from 2014. We have stock of common sizes at hand, so even few ton is accepted. From material to products, we inspect each process to keep good quality. And SGS inspection can be accepted. After you confirm our PI (Proforma Invoice), we will request you to pay. We accept T/T, L/C.