Item Type: Wheelchair CasterMaterial: PU, alloy steelWheel Outer Diameter: 16 inchesWheel Thickness: Approx. 50mm / 1.97inWheel Center Hole Diameter: Approx. 45mm / 1.77inMounting Hole Diameter: Approx. 9mm / 0.35in .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; } 1Alloy Steel Wheel Hub: Our electric wheelchair caster wheel hub is made of alloy steel, and the inflatable wheel hub has a strong load bearing capacity. 2Rustproof and Durable: The tire texture of the electric wheelchair caster is non slip and abrasion resistant, and the overall rustproof and durable, very sturdy. 3Stable Performance: This electric wheelchair caster is suitable for various road surfaces, so you can have a good experience of using it with stable performance. 4PU Material: The electric wheelchair caster is also made of PU material, which is suitable for electric wheelchairs, carts, etc. 5Professional and Accurate: The electric wheelchair caster adopts excellent manufacturing process, which is professional and accurate and very easy to install.