The 1560M is the mobility version case with internal dimension of 20.37" x 15.43" x 9.00". It has retractable extension handle, 4" diameter x 1.5" wide (10.2 x 3.8cm) heavy duty polyurethane wheels with stainless steel bearings, easy open double throw latches, open cell core with solid wall design - strong, light weight, O-ring seal, automatic pressure equalization valve, comfortable rubber over-molded top and side handles, stainless steel hardware and padlock protectors.