[Load Capacity]: 28 lbs each wheel. Total 110 lbs for 4 wheels. Wheel Size: Total height 24mm (1 inch), mounting plate diamater 44mm (1-3 or 4 inch), mounting hole diameter 4mm, distance between diagonal holes 36mm. [Low Profile and 360 Degree Rotation]: Low profile casters 't add too much height to furniture and yet can support a good amount of weight. Larger steel ball in ABS bracket rolls more smoothly compared with other small balls. [Quick and Easy Installation] Install swivel wheels on the feet or legs of such as coffee table, shelves,cabinets,dressers, plant stands with included adhesive pads or screws. Make moving furniture quick and easy. Tips: 1.These caster rollers only work on smooth and hard surfaces, may leave tracks on wood surfaces. 2. We suggest you use screws to install casters wheels for heavy objects. [Wide Applications]: Not only for furniture but also for storage bins, file cabinets, nightstands, underbed storage drawers, tool box, air purifier, standing or tower fans and other appliances... Colour:Black Material:PlasticandSteel Ball Size:Diameter about 4.4cm Package Contents: 4 x wheels 4 x adhesive pads 16 x screws Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.