Construction: CNC lathe-turned alloy end caps; black electroplated steel hardware; rugged polycarbonate clear tube. Fitment: Mounting hardware on US-spec license plates fits into the L-brackets on stash tube to hold the assembly in place. Plastic tube houses documents and contraband to keep info and materiel safe. Details: Fits license plate bolt pattern in all 50 US states. Does not fit Euro, Australia, or Asia spec license plates.