
【Compatible With】Replace for STIHL 017 018 021 023 025 MS170 MS180 MS210 MS230 chainsaw. 【Package Includes】Sprocket cover × 1, chain tensioner × 1, nut × 2 and stud × 2. The parts replacement work will be quick and easy. 【Effective Protection】The sprocket cover can keep the sprocket clean and protect the chain wheel from damage, helping the chainsaw run smoothly. 【OEM Number】# 1123-640-1705. Based on strict OEM standard, the specifications and size are exactly the same as the original. 【Durable Design】Made of sturdy ABS plastic, built to last.