BUD Industries BPA-1531 Aluminum Chassis Bottom Plate, 16-51/64" Length x 16-51/64" Width x 9/64" Thick, Natural Finish For use with 17" length by 17" width aluminum chassis Used to protect wiring or components, or as a dust cover on underside of chassis Made from 0.040" thick aluminum Natural finish Measures 16-51/64" length by 16-51/64" width by 9/64" thick