FREE: Metal Box to make E bike battery explosion proof case.- ON HOLD

I got this with the intention of making an explosion proof case / box for my ebike battery while charging. Would have to remove center support in middle and punch hole for cords. Sandblast it at Blast It! and spray paint with heat resistant spray paint. Basically make my own Big Cat Battery box that sells for $220 plus tax. Approximately 4.25 x 6.25 x 21.25 ". ON HOLD, pending pickup