Feature: 1. Smoother and powerful operation, deep lubrication, smoothly ride, labor saving, and improved efficiency 2. Precise thread, tightly fix the hub, precise machine tool to grind the thread, riding more assured. 3. Exquisite workmanship, fine quenching, special high‑strength steel, brown chrome plated, more durable. 4. Lightly turning, running smoothly, the live flywheel turning lightly, there is only a slight ticking sound when running. 5. Wide range of applications, suitable for single speed, ordinary, BMX bicycles, folding bikes, etc. Specification: Item Type: Bicycle Freewheel Material: Steel Process: Fine Quenching, Special High Tensile Steel, Brown Chrome Plating Thread Inner Diameter: Approx. 34mm 1.3in Number of Teeth: 20T Application: For Single Speed,Normal,BMX Bicycle,Folding Bike. Package List: 1 x Bicycle Freewheel