<li><p>This set of four casters allow you to move and adjust the position of your rack to suit your needs</li><li> The casters connect to the bottom of any rack with 42 mm x 55 mm caster mounting holes such as our:</p> <ul> <li>4POSTRACK12</li> <li>4POSTRACK25</li> <li>4POSTRACK36</li> <li>4POSTRACKBK</li> <li>RKQMCAB12</li> </ul> <p>This TAA compliant product adheres to the requirements of the US Federal Trade Agreements Act (TAA), allowing government GSA Schedule purchases</li><li></p> <p>4POSTCASTER is backed by a StarTech</li><li>com lifetime warranty</li>