Linear Guides MGN Series: 150mm MGN7 linear rail guide with MGN7H block There are 10 holes on the rail for fixing the rail to the machine with nut and screw, and it is suggested to use T nut M3 if you fix it to series EU Al-profile There are 2 Transparent rubber stoppers on the ends of the rail in case the carriage falls off the rail, please remove them after assembling the rail on your machine if necessary. Style:MGN7H size:150mm Material:metal colour:Silver+Green Package Contents: 1 x MGN7 linear guide rail 150mm long 1 x MGN7H block (installed on the guide rail) 2 x transparent rubber stopper Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.