18″ Big Mouth Semi Truck Step Boxes

50% Larger opening than traditional step boxes allow you to store more tools, more easily.
Enables the Use of Unused and Hard-To-Use Frame Space.
Adds Useful Additional Storage.
Strong, Lightweight Aluminum Construction.
High-Quality Automotive Bulb Seal for Water Resistance.
Step Tread Increases Safety by Reducing the Possibility of Slipping.
Suggested Mounting Kit: Steel L-Brackets: 24×24″ P/N: 1900, or 24×30″ P/N: 1901