ABS TROLLEY LUGGAGE 1. BRAND:AS BUYER'S OPTION 2. CERTIFICATE: IS0 9001:2008 3. 4 ROTARY WHEELS 4. INTERNAL TROLLEY SYSTEM ABS TROLLEY LUGGAGE1. BRAND:AS BUYER'S OPTION2. CERTIFICATE: IS0 9001:20083. ROTARY WHEELS4. INTERNAL TROLLEY SYSTEM5. If you have other requirments,like air wheels, TSA lock,expandable,also OK