... threaded with sockets/coupling and plastic caps/flangeSurface treatmenthot dipped galvanized, oiled or black painted to prevent rustInspectionhydraulic testing, ... water supply projects; building, central air-conditioning pipe, fence, threading pipe, rolling doors, metal frame, support tube ... , furniture, sports equipment, fence, etcPackage1.bundle 2.in bulk 3.Bags 4.accoring ...