90 25 20 E01 1 pair of spare blades for 90 25 20 (protective pipes) For cutting composite pipes Ø12.0 to 25.0 mm and for cutting flexible protective tubes Ø 18.0 - 35.0 mm without damaging a potential pipe inside. A calibration arbor can be fitted, for example for Geberit composite pipes with Ø 11.5 and 15.0 mm.