This HDX 4-Piece 4 in. Industrial Caster Set holds up to 600 lb. and includes 4 casters, 2 of which have brakes for added functionality. The casters feature 1 in. dia. posts and 3/8 in. inserts for durability and coordinate with select Perfect Home storage units (sold separately). The casters are easy to assemble. For use on HDX light and heavy duty 4-shelf, 5-shelf and 6-shelf unit. Maximum weight capacity 600 lbs. when weight is distributed evenly 2-wheels include brakes for added functionality Weight in package 4lb This item is intended for indoor use This item is not intended to be stacked Features Item Weight 1.65 Wheel Material Plastic Package Quantity 4 Features No Additional Features Thread Measurement 0.375 Color black Color Family Blacks Returnable 180-Day Casters Product Type Stem Load capacity per caster (lb.) 400 Swivel/Rigid Rigid Builders Hardware Product Type Casters Wheel Diameter (in.) 4 Assembled Width (in.) 2.50 in Product Height (in.) 4.75 in Wheel Width (in.) 4 Assembled Height (in.) 6.25 in Stem Width (in.) 0.375 Stem Length (in.) 1.25 Assembled Depth (in.) 4.00 in Product Depth (in.) 4 Product Width (in.) 4 in Manufacturer Warranty Please call customer service 888-449-5520