-Low profile lids that are compatible with the F-Box Magnetic Medium Rig Box Systems
 -User simply detaches the two halves of either of the Medium Rig Box Systems and then attaches the lids to each half via the magnetic hinges
 -Helps to create even more compact rig storage
 -Magnets ensure firm closure
 -Moulded ruler on outside allows for accurate rig tying
 -Two lids per pack