DOP11730WA1030 Wacker BTS1030 Nikasil Plated Cylinder Assembly. This is a high quality aftermarket 50mm bore kit that fits Wacker BTS1030 and BTS1030 L3 cut off saws. Includes cylinder, piston, ring, pin and two e-clips. Replaces OEM part numbers 0108119, 0202780, 0202781, 0206855 and 0213561.