General description Fits Stihl 017, 018, MS170, and MS180 chainsaws. This carburetor kit is a replacement accessory designed to enhance the performance of your chainsaw. Technical specifications Compatible with Zama carburetor part numbers: C1Q-S57, C1Q-S57A, C1Q-S57B Material: High quality aluminum Other information 100% satisfaction guarantee Please check compatibility and images provided before ordering.