
【Compatible with】Replaces the STIHL 017 018 021 023 025 MS170 MS180 MS210 MS230 chainsaw. 【Package includes】Sprocket cover × 1, chain tensioner × 1, nut × 2 and bolt × 2. Replacing the parts is quick and easy. 【Effective protection】The sprocket cover keeps the sprocket clean and protects the sprocket from damage, so the chainsaw runs smoothly. 【OEM number】# 1123-640-1705. Based on strict OEM standards, the specifications and dimensions are exactly the same as the original. 【Durable Design】Made of sturdy ABS plastic, built to last.