Specifications include, but are not limited to: 20 TON RAMP TYPE TRAILER Kraftsman 20 Ton Tandem Dual Axle Equipment Trailer or Approved Equivalent Model listed may require equipment not normally listed as standard or optional equipment. This shall be an option to add additional deck length in 1' increments to trailer described in Item 1. This package will allow to increase the axle to 25,000 lbs. per axle in lieu of 20,000 lbs. per axle of unit described in Item 1. Cross members will be increased 6" and springs to be upgraded. Air assisted ramps, 60" tall x 30" wide in lieu of ramps as described in Item 1. It is the responsibility of the manufacturer to ensure proper tongue weight on the trailer described in Item 1 when using this option. Option to add tire inflation system to unit described in Item 1.