The file 'Auto Bed Level Sensor Holder 3D Printer Model' is (stl) file type, size is 203.5KB.
this is a bed level sensor bracket to suit an 18mm dia sensor attached to this great thing http://www.thingiverse.com/thing:510957
The thru hole is not 3 mm so you have to drill thru 3mm when in place which gives the best possible fit
PM_Z_sensor_holder_R2.stl | 519.7KB |