Detail Information: the size is about 1.8 x 1.8inches/ 4.8 x 4.8 cm, 4 wheels can bear 77 pounds, there are enough quantities to meet your needs and replacements Materials: the adhesive wheels are made of quality ABS plastic and stainless steel materials, sturdy and serviceable, which do not fade, deform and break, you could use for a long timeMove at Will: the mini swivel wheels adopt a double thickened steel ball design, you could move without worrying about angles, providing you with a using experienceEasy to Stick: just stick the small casters under the furniture as you without punching holes, saving time and energy of installing, a surface is a to stick toWide Application: the self adhesive mini wheels can be applied to many different furniture such as storage bins, trash cans, bedside tables, flower pots and more, it is convenient to move color:BlackMaterial:ABS, stainless steelPackage Contents:8 x Mini Caster Wheels for Small AppliancesOnly 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.