Weight: 1.5KG Material: ABS, steel, EVA foam Max Bearing: 200KG Front wheel size: 6cm Rear wheel size: 7cm Brand Name: AdrianGames Model Number: GG510 Type: Four-Wheeled Function: Waist & Abdomen Exercise High-concerned chemical: None Origin: Mainland China Type of sports: Strength Training Application: AB Roller Coaster Choice: yes semi_Choice: yes