Folding Bike Chain Derailleur Chains Guide Adjuster Chain Tensioner for Bicycle Accessories Gold

Made of CNC aviation aluminum alloy, corrosion proof, rustproof, ultralight but high strength.Designed to provide a simple, effective and adjustable way to tension chain and speed change.Converts any speed bike to a single\/2\/3\/6 speed for hanger dropout frame.Rear Derailleur Mount, Dual wheel guide wheels and built-in spring keeps chain stable and never dropping.Compatible with for Folding Bikes.Size: 18x13x6cm\/7.1x5.1x2.4 inchColour: goldMaterial: aluminum alloyPackage Contents:1 * Folding bike derailleurOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +\/- 1-3cm.