The PVC tubes, pre-sleeved for gluing, in light gray color and 4m long 6m, are manufactured by extrusion at 180°C of polyvinyl chloride stabilized and treated against U.V according to standards NF T 54-017, NF T 54-018, NF EN 12 200-1, NF EN 1329-1 to meet building needs, sanitation, drinking water supply,industry, irrigation, P.T.T sheaths and electrical sheaths.