Product Description: 75mm and 100mm models, conventional screw size M12*25 Curved double wheels, beautiful appearance Non-marking thermoplastic rubber wheels, softer, shock-absorbing, low noise Nylon brake for easy control. Product Parameter: Size(inch)Wheel diameterWheel widthLoading CapacityBearingMaterialHeight of installationRotating radiusRotating radiusThreaded stem 3755570Double bearingTPR/PA98678412*25 41007590Double bearingTPR/PA126.3/120.98111312*25 Applications: High frequency electrotherapy equipment, ultrasonic equipment, washing machine, medical equipment, beauty equipmentTwin-wheels Medical Caster Wheel website:http://www.dlpocaster.com/medical-caster-wheels/twin-wheels-medical-caster-wheel/