Feature:1. Made of highquality aluminum alloy, durable and wearresistant, and the smooth surface has very little friction to ensures easy movement.2. Light weight, easy to install even in high altitude areas.3. Fitness equipment accessories, aluminum alloy roller skating is an excellent substitute for some wornout roller skating on gym machines.4. Suitable for 10.5mm inner diameter, easy to replace.5. Universal pulleys are designed for most fitness equipment, suitable for most fitness equipment, gyms, home gyms, commercial or person use.6. 2 different sizes for you to choose, meet your different needs.Specification:Condition: 100% brand newItem type: Fitness PulleyMaterial: aluminium alloyColor: As picture shownWeight: Approx. 165gInner hole diameter: Approx. 10.5mm/0.4inSize Groove depth(mm/in)Groove width(mm/in) Diameter 70mm 9/0.35 9.5/0.37 Diameter 80mm 10/0.4 13/0.5.Package List:1 xFitness Pulley