Iverntech MGN12 400mm Linear Rail Guide with MGN12H Carriage Block for 3D Printer and CNC Machine</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Rail Guide Length: 400mm</li><li>Block: MGN12H carriage</li><li>There are two rubber stoppers on each side of the linear rail， it can prevent the carriage block from falling out while assemble the rail to your machine， don't forget to take it down before running your machine</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/41dJ2tVG2BL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/41-6puV%2B7wL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/41G2Tn6mcPL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/31B4jnd9C0L.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/41pDAzW7MoL.jpg' noproxy></br>