Excellante Caster And Plastic Bumper For Security Cage， 5"， Chrome</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>The caster can swivel for instant response， control and movement</li><li>Features a bumper for added protection and safety when shelving unit is in transport</li><li>Durable composite polyurethane & ABS wheel construction ensures solid support</li><li>For use with the OPTIONAL shelving unit</li><li>The OPTIONAL 5" caster allows you to customize the shelving unit with added mobility</li></ul></div></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br><img src='http://ecx.images-amazon.com/images/I/41muEHpKfZL.jpg' noproxy></br>