APL 5CT LSAW Pipe, LSAW Pipes, API 5L LSAW Pipe External coating: 3 layers polypropylene and 3 layers polyethylene Length: SRL and DRL Outside diameter: 219 to 610mm Thickness: 5 to 20mm Standards: A106, API 5L, APL 5CT Product link: http: //www.landee.cn/api-5l-apl-5ct-lsaw-pipes.html