S20 Service Boxes are Heavy Duty, High Capacity, Built Tough with Powder Coated Steel and offer easy access from side of the Truck. This Box can be mounted under the Bed of Half, Three Quarter, or One Ton Trucks, Gooseneck Trailers or Tandem Straight Trucks, or they can be mounted on top of Pickup Truck Rails, Flatbeds, or any Contractor's Professional Service Vehicle. They do not have a fully Concealed Rain Gutter, but are instead designed with an Exterior Rain Gutter across the top.
For Truck Bed Top Mount Mounting Kit purchase: M3200D.
For C-or I Frame Mounting Kit purchase: Part Numbers M2000C, M2000I, M2100C or M2100I.
For Under Deck Mounting Kit purchase: Part Numbers M32236D or M2248D.
Installation Instructions: http://www.americantruckboxes.com/images/PDF/ISL1050.pdf
Description Sheet: http://www.americantruckboxes.com/images/PDF/DST1050-1.pdf