1、Applicable Model: The piston cylinder kit is specially designed for the STIHL MS170 chain saw, perfect applicability to meet your needs. 2、Part Number: OEM number for reference are 1130 020 1207, 1130‑020‑1207. Please double check the part number of your item before ordering. 3、Advantages: Cylinder piston kit has low noise, low expansion coefficient, improved heat dissipation, strong power, low fuel consumption and lower friction surface. 4、Rugged Construction: The piston and cylinder set is made of die casting aluminum, which is not easy to break, anti aging, rust proof and wear resistant, and durable. 5、Exquisite Workmanship: Professional manufacturing, compact structure, high performance, strong reliability, making sure safety use.