Rods For Plastic Welding ODS FOR PLASTIC WELDING Materials: (HDPE), (HDPP), (PA6), (PVC). Cross Sections: circular cross section with diameters: – Ø 3, mm – Ø 4, mm – Ø 5, mm. rectangular cross section: – ( 3 x 3 ) ,mm – ( 3 x 6 ) ,mm – ( 4 x 6 ) ,mm