Move your desk. Attach the DA-11-Black caster wheels to your easily mobilize your workstation. The bearings provide smooth swivel movement. 4 Lockable standing desk wheels. Use the locks on each wheel to prevent both movement and pivoting to keep your desk stationary. Set of 4. Standing desk Caster Wheels include 4 polyurethane wheels. Each wheel holds up to 88lbs! Dimensions: 3.9"x 1.7" x 3.5" (adding only 2.4" to your desks height when installed) 18 Months warranty