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Certificate Number : SPF21031878A1 CE : Certificate Is Electric : No Battery Block Size : Small building block Certification : CE Gender : Unisex Plastic Block Shape : Self-Locking Bricks Plastic Type : ABS Model Number : Gear Material : Plastic Brand Name : lizhi Recommend Age : 18+,14+y Origin : Mainland China Building Block Brick : Technical Part Technical Part : Gear Gear : 8 tooth,12 tooth,16 tooth,20 tooth,24 tooth,28 tooth,36 tooth,40 tooth,Differential,Worm Screw,Gear Rack,Curved Rack,Gearbox