Piston Kit with Ring, Wrist Pin, Circlip fit - STIHL 021 023 MS210 MS230 1123 030 2003 2019 40MM Aftermarket Brand: ITACO Fit STIHL 021 023 MS210 MS230 chainsaw. Replaces OEM Part #: 1123 030 2019, 1123 030 2003 Piston diameter is 40MM. Estimated Time of Delivery from Singapore: 7-16 working days