This filler piece is a simple solution for using the FAA PMA Hawker J16 SBS battery in a Piper PA22/20 aircraft. It's 3d printed from high temp ABS plastic. This piece simply slides into the box to cradle your Hawker battery. It will fit your factory battery box exactly like a concord battery. This allows you to use your factory battery cables.
Note: This item is NOT FAA PMA'd. The use of it will require field approval.