The Elyar 21" protective rolling case is for the traveller. Wheels make it easy to transport heavy or sensitive items. Pluck and pull foam allows for custom compartmentalization which keeps belongings organized and secure. A tough outer provides shock resistance. A strong seal around the edges gives the case water and dust resistance. Air pressure equalizer allows for compensation in alititude if travelling. Uniform grooves create stackable effect. Outer: 24.43” x 19.43" x 9.65" Inner: 21.48" x 16.5" x 7.87" Water proof Shock resistant Pressure equalization valve Multiple layers of pluck and pull foam Black Stackable Lockable fittings 19 lbs