Magnet holder/ pull for 1-7/8" L x 7/8" W x 3/8" H bar type magnet. This is a common type of magnet found at the local hard ware store or at http://www.harborfreight.com/pack-of-2-ceramic-block-magnets-97504.html The holder is a little bit deeper than 3/8 to accommodate some glue and keep the magnet from touching the surface it is attracted, to it would be a real shame to scratch your fridge or a brand new EOS M280. A blank magnet holder Magnet Holder (No Name) is available for download in case you do not want our logo plastered on your fridge. Run the part with the open cavity facing down. Supports are not necessary because the top of the magnet cavity will bridge well on most machines the resulting surface it makes a great gluing area. The part can be built with low infill ( 60% or so) because it is not a mission critical part. Glue the magnet in place with epoxy or gel type super glue.