Product information:
Color:
Style 1: new second generation plus or minus 9 (Amazon white box),
Style 2: new second generation plus or minus 9 (Amazon white box),
Style 3: ordinary plus or minus 9 (color box),
Style 4: Normal plus or minus 9 (color box),
Style 5: ordinary plus or minus 9 packs (white box),
Style 6: ordinary plus or minus 9 packs (white box),
Style 7: ordinary plus or minus 9 packs (pet bucket),
Model 8: ordinary plus or minus 9 packs (pet bucket),
Style 9: luminous addition and subtraction 9 packs (color box),
Style 10: luminous multiplication and division 9 packs (color box),
Style 11: luminous addition and subtraction 9 packs (white box),
Style 12: luminous multiplication and division 9 packs (white box),
Style 13: luminous plus or minus 9 packs (pet bucket),
Model 14: luminous multiplication and division 9 packs (pet bucket)
Material: Plastic/plastic