Minimization of possible untoward effects on operator by installing VXB004100RBF just ask your operator to push and pull, but not carry. The wheel diameter is 100mm or 3.937" inch in inches. The wheel has a width of 35mm=1.378" inch. Overall height of the wheel caster is 130mm = 5.118" inch. This wheel caster can be mounted using a Top Plate with the dimensions of 93mm x 62mm and holes distance of 45mm x 72mm. This caster wheel core material is Rubber and has a Rubber tire spinning over Ball bearing. Bearing in mind that every caster wheel has the load capacity of 154 lb with a Rigid type. Temperature range is -40 to 180 F. Very important notice, you need to buy the VXB004100RBF in order to get one :).