Northern Tool offers the Northern Tool + Equipment Underbody Truck Tool Box in Gloss Black/Silver for $269.99. Coupon code "260475" cuts the price to $249.99. Opt for in-store pickup to dodge the $131.62 shipping fee. That's $50 off list and the lowest price we could find. It measures 36" x 17" x 18" and designed to provide extra storage under a flatbed or trailer.