4pcs Universal Caster Wheels Furniture Caster Plastic Self-adhesive Wheel Storage Box Trash Bin Sticky Pulley Portable Black Description:360 degree rotating: The universal sticky pulley set can slide smoothly when working, and the rotation is very fluent.Long use time: This caster wheel is made of plastic and stainless steel, which has stable structure, and very sturdy.Practical function: The sticky pulley can help move items, and you needn't complicated and laborious handling, which is labor-saving.Good performance: The universal caster has low noise, which can make your work more convenient and easier.Easy to use: The universal wheel is designed self adhesive, which is very convenient to install for storage box. Specification:Material: Plastic, stainless steel.Size: Approx. 3.5x3.5x1.35 cm/1.38x1.38x0.53 inch.Color: Black, white.Type 3: Black Stainless Steel Bead.Type 4: White Stainless Steel Bead. Note:There might be a bit color distortions due to different computer resolutions. There might be a slight errors due to different hand measurement. Package Includes:4 Pieces Universal Caster Wheels.