Features: 1.Every product has a unique Manufacturing Part Number label on the inner package that proves it has been qualified,which include Part Number,Model Number and inspection date information;2.If you have any questions about the item,please provide us the Manufacturing Part Number for checking,your profits will be guaranteed.3.Great for luggage, suitcase and trolley.4.Ideal for replacing worn-out wheels or as a back-up.5.Simply remove the old or damaged wheel and screw on the replacement.Note: 1.Please allow 1-3mm error, due to manual measurement.2.It's front and rear universal casters.Specifications:Material: PVC PlasticColor: Black name: BQLZRModel: W293 Total Height: approx 7.8cm/3.07 inchesWheel Dia: approx 4.9cm/1.93 inchesHeight from the ground: approx 6cmHole Center to Center Distance: approx 3.4cmWeight: 196gPackage include:2 x Casters8 x Screws