These Castor Wheels-Set of 4 are designed for use with Smartbox SB-CT14BD. They allow for an easy install on the Smartbox SB-CT14BD for use of the device as a Free Standing trolley, Up to 2 Smart boxes can be stacked on top of each other when used with castors.

* Designed for Smartbox SB-CT14BD
* Set of 4 Castors
* Up to 2 Smartboxes can be stacked on top of each other. 

* Easy to install and use* Saves desk space & provides Mobility* Flexibility to easy moves the Smartbox between rooms.