Kesuda Folding Bike Tline Upgrade 5/6/7 Speed Tension Arm Chain Tensioner

This is a chain tensioner for folding bikes, designed for upgrading to 5, 6, or 7 speeds. The product number is AL001140. The material is aluminum alloy. The product code is RD25-7-speed rear derailleur. It is suitable for export and is a cross-border e-commerce exclusive supply. It has passed foreign trade export certification. It is not imported.