Feature: These light and flexible plastic wheels won't scratch your floor, moving quietly and smoothly. You can install these cart replacement wheels by yourself with simple tools. Ideal for indoor hardwood flooring, tile and carpet. Suitable for most seats, shelves, shopping baskets, cribs, appliances equipment, and kinds of industrial equipment. Size:Overall 5.6x4.8cm,Wheel 4cm,Metal Base 3.6x3.6,Hole 5mm