PER195A: Alu 19 x 5 (for PRB335N), for thin-walled metal pipes (especially suitable for copper and aluminum), PER1962AC: Alu, Cu 19 x 6.2 (for PRB676), for thin-walled metal pipes (especially suitable for copper and aluminum), PER2662K: Plastic 26 x 6.2 (for PRB676), for plastic and composite pipes,
