4 Inch Heavy-Duty Galvanized Steel Garage Door Pulley</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>For sectional garage doors and doors with extension spring set-up</li><li>Maximum Cable size 3/16"</li><li>There should be very little movement in the pulleys except their rotation</li><li>If they do not turn smoothly or wobble， replace them</li><li>4 Inch stem</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/21f9ycUCl2L.jpg' noproxy></br>