Horizon 5002 Sturdy Steel Over The Seat Hard Hat Rack, 2-1/2" Width x 2-1/2" Height x 2" Depth Hold all manufacturers hard hats  regular, wide brim and cowboy hat style Secure hard hat safely in vehicles  comply with ANSI Z89.1-1986 carrying and storage of head protection recommendations For use in passenger vehicles or pickup trucks Made of sturdy steel Measures 2-1/2-inches width by 2-1/2-inches height by 2-inches depth