This hard case has a retractable extension deal with and strong polyurethane wheels with designed with stainless steel bearings.Features: o Easy Open Double Throw Latcheso Open Cell Core With Solid Wall Design - Strong, Light Weighto O-Ring Sealo Automatic Pressure Equalization Valveo Fold Down Handleso 4 Level Pick N Pluck(TM) With Convoluted Lid Foamo Watertight, Crushproof, And DustproofDimensions: o Interior - 21.48" W X 16.42" D X 12.54" H (54.5 X 41.7 X 31.8 Cm)o Exterior - 24.76" W X 19.57" D X 13.9" H (62.9 X 49.7 X 35.3 Cm)If you are interested or have any more questions, CALL me. Willy .