... 4.in PVC material Tairong Machineryextrusion mould for PVC wire cable trunking (multi cavity, top and cover co-extrusion)Main Products ... of Zhangjiagang City Tairong Mold CO.,LTD.:PVC cable trunking extrusion mouldsmore than 8years experiences different pvc, ppr,abs, ... the stability of moulds. extrusion mould for PVC wire cable trunking (multi cavity, top and cover co-extrusion)