This is a high-quality 3/8"LP pitch, 6-tooth Archer replacement spur sprocket with a needle bearing.
Fits Stihl models: 017, 018, 019, 019T, 021, 023, 025, MS170, MS180, MS181, MS190, MS192CE, MS210, MS211, MS211C, MS230 Duro, MS250, MS251
This sprocket replaces Stihl part# 1123-640-2073
Archer Chainsaw accessories are made with quality and sold all over the world.