About this 3D model

Intended to have a 1/4 x 1/4 rare earth magnet glued inside of it. Such as amazon link below http://www.amazon.com/Neodymium-Magnets-inch-Cylinder-N48/dp/B001KV9RAW/ref=sr_1_46?ie=UTF8&qid=1394664231&sr=8-46&keywords=1%2F4+x+1%2F4+neodymium+magnet