Fitments: For STIHL 017 018 021 023 025 Chainsaw MS170 MS180 MS210 MS230 MS250 Replace 1123 640 1705, 1123 664 2400, 0000 955 0801 Package including: 1 Sprocket Cover: 1 Sprocket Cover: 1 Sprocket Cover: 1 Sprocket Cover , 1 Pair Rod Bolts, 1 Pair Rod Nuts, 1 Bumper Spike