Compatible with: For Stihl 017 018 019 020 021 023 024 025 026 028 034 036 038 046 048 MS170 MS180 MS230 MS250 MS270 MS360 MS640 Replace the part number for 57-016, 000 9550 0801. You will receive: 1 x Crench chainsaw, 6 x chainsaw nuts High quality and long -lived spare parts accessories, please carefully compare your original model with our images and product details to avoid the problem of model incompatibility. No more questions, hesitate not to contact us