Feature: 3.Round 4 hole design, easy to install and take off4.Suitable for Bags, luggage, trolley case, with a light weight, heat insulation, thermal insulation, moistureproof, flame retardant, convenient use, etc 5.One Pair Luggage Suitcase Wheels Left & Right 6.The luggage wheel rotates 360 degrees and is only suitable for hard case luggage.Note:1.This is DIY parts.2.The holes between suitcases and wheels maybe little different because of different production batch,if not match,you need to adjust the holes by digging the holes on the suitcase by yourself.3.Once position the hole,you can install it with screw.Whatever the difference is,you can adjust the hole on the suitcase,and then install with screws.4.To make sure that it is suitable for your use, please check the dimension on the picture and Features:.And there is 3mm error for manual measurement.Note:1. Before purchasing, compare whether the arrangement of holes is consistent.2. Compare the size of the hole position and the height of the backrest at the edge of the screw hole.3. Only after the size is confirmed can it be ensured that it can be replaced perfectly.Specification:Color: BlackMaterial: Plastic + MetalBrand name: BQLZRModel:W013Wheel Diameter:4.8cm/1.89inDimension:10 x 9.3 x 4.8cm/3.93x3.66x1.89inch(LxWxWheel Dia)(A deviation of 1cm)Screw hole edge backrest height: 11mm/0.43InchWeight:268gPackage include:2 x Luggage Wheel (Left&Right)4 x Screws1 x Dual Purpose Screwdriver (Cross and Flat)