The model number on the box is the production batch number; the actual product shall prevail. DETAIL: Block Size : Christmas Micro building block Plastic Block Shape : Self-Locking Bricks Plastic Type : ABS Warning : small part not for the kid under 3 years old Material : Plastic Recommend Age : 6+ Origin : Mainland China PACKAGE LIST : 1 set bricks set NOTE: Size may be 2 cm / 1inch inaccuracy due to hand measureContains small parts, not intended children under 3 years.