The 1620M is a mobility version case with interior dimension of 21.48" x 16.42" x 12.54".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, fold down handles, stainless steel hardware and padlock protectors.