The plastic nubs that keeps the door closed on my printer finally all broke off so my door wouldn't stay closed. I printed this little block with an indent in for a magnet. I then glued it to the upper left corner of my door so it sticks to the metal frame. Now my door stays closed.You need to space it about 1/8" to the right (as you look at the outside of the door) to clear the plastic of the top front of the printer that sticks down in the top left of the door opening. I used a drop of loctite gel control super glue to hold in the magnet and glue to the door. The magnet I used was a 5/16" dia. 5/64" thick rare earth magnet. I had to shave out the hole diameter just a little to make it a tight fit, but the depth printed perfect.