WEIGHT31" - 11.6 lbs - 5.3 kg27" - 9.5 lbs - 4.3 kg21.5" - 6.9 lbs - 3.1 kgDIMENSIONS31" x 20" x 12.5" - 79cm x 51cm x 32cm27" x 17.75" x 11" - 69cm x 47cm x 28cm21.5" x 14.5" x 9" - 55cm x 37cm x 23cmMATERIALPolycarbonate CompositeEXPANDABLEYes, 21.5", 27", 31"TSA LOCKYes, 21.5", 27", 31"WHEELS360° Spinner WheelsWARRANTY5 Year Warrant