Pilot Frixion ball point pen spare slim inks 0.5mm for multi ink ball point pen (Black,Red,Blue,Green) 3 packs set Total 12 Spare inks from Japan ball point pen refill for multi ink Frixion ball point pen. Black, Red, Blue are for Multi Color Frixion Green is for Multi Color Frixion or Frixion ball slim point size 0.5mm / Size: H88  shaft diameter 3mm LFBTRF-30EF-3C & LFBTRF-12EF-G