Replacement Refills for Frixion Ballpoint Slim Extra LFBTRF30EF [4-Color Set] Pens, Type, Multi-Color, Black, Red, Blue, Green, 0.5mm Fine,

Frixion Ball Multi-Color and Frixion Ball Slim Replacement Refill Set (4 colors) Black, Red, Blue, Green Each pack contains 3 bottles of black, red, and blue. Green only, 1 piece included. This is a four-color refill set (black, red, blue, and green) for Frixion Ball multi-color and Frixion Ball Slim pens. Since the ink erases when rubbed, it's convenient for repeated rewriting. The set includes three refills each of black, red, and blue, and one green refill. The ball diameter is 0.5mm. Please do not use this product on documents where the ink must not be erased, such as official documents or addresses.