... have class 3&class 4 conduit. Pipe threaded both ends,with coup This pipe is BS standard Electrical tube,through wires ... We have class 3&class 4 conduit. Pipe threaded both ends,with coupbs4568 pipe SIZEOUTSIDE*WALL THICKNESS*LENGTH1616x1.4x3750mm2020x1.6x3750mm2525x1.6x3750mm3232x1.6x3750mm ... (Class 3) and Hot dipped galvanized(Class 4). This pipe threaded both ends,one end with a coupling,another end ...