Features 1、Made of PU material, uniform thickness, fine surface brightness, wear‑resistant. 2、Built‑in accurate bearings, moving not stuck. 3、Low frictional resistance, high temperature resistance, high speed, low noise, dust‑proof. 4、Scrape‑proof and scratch resistant, this caster is guaranteed safe to use on a variety of surfaces. 5、Can be used on small carts, doors, hardware. Specification Features: 1. Made of PU material, uniform thickness, fine surface brightness, wear-resistant. 2. Built-in accurate bearings, moving not stuck. 3. Low frictional resistance, high temperature resistance, high speed, low noise, dust-proof. 4. Scrape-proof and scratch resistant, this caster is guaranteed safe to use on a variety of surfaces. 5. Can be used on small carts, doors, hardware. Specification: Condition: 100% Brand New Item Type: Caster Material: PU Bearing specifications: ABEC-7 Bearing Model: 608ZZ Bearing Inner Diameter / Caster Inner Diameter: Approx. 8mm / 0.3in Caster Outer Diameter: Approx. 100mm / 4in Caster Thickness: Approx. 24mm / 0.9in Uses: used on small carts, doors, hardware Package List: 1 x Caster Note: 1. Please allow slight error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. Package List