Portasol PE Black 8-Inch Plastic Welding Rod (Pack of 25) Repair sticks for welding and repairing your motorbike facing, car bumper, canoe or all other thermoplastic materials. 25 sticks in a pack. Ideal for use with the Portasol PP-75 Cordless Plastic Welder. PE Black. Rods are 4mm in width.