this piston has 20 teeth on the outer rim - outer diameter approx. 176 mm at the rubber 163 mm - inner diameter approx. 146 mm, height incl. teeth approx. 27 mm
only for transmissions with starting clutch instead of converter (serial nos. 722.930, 931, 932, 971) - for all other transmissions the correct B1 piston is our ref. PIS-722.9-B1