Meets UPS and FedEx requirements for 2010 shipping standards Two Heavy Duty Rubber InLine Skate Wheels for Smooth Mobility Improved Straps for Easy TSA examination Bulletproof Polyethylene shell Includes three foam layers and internal tie down straps External dimensions 45 x 28 x 10 Internal dimensions 43.5 x 26.5 x 9.25 Weight 31 lbs.