New Reflective Rear Bike Rack Bag. This came with an electric bike conversion kit but wasn't used.  It was supposed to be for a battery bank but I made my battery box out of wood.  This bag could have many uses.  it has 6 each 3"-4" velcro straps on bag that are used to strap it to a bike rack (see pictures). It also had a few 1" round holes on the bag bottom for ventilation or run wires through. There are also holes inside the  bag too.  There are pictures of the bag dimensions too.