The model number on the box is the production batch number; the actual product shall prevail. Description:Block Size : Micro building blockPlastic Block Shape : Self-Locking BricksPlastic Type : ABSWarning : small part not for the kid under 3 years oldMaterial : PlasticRecommend Age : 14+Origin : Mainland ChinaPackage inlcued:1 pcs Building BlockNote:Size may be 2 cm / 1inch inaccuracy due to hand measureContains small parts, not intended children under 3 years.