Pre-order item Without the cap, the pen core will not dry for about two weeks! You can work for a long time with the cap off all day long. Since the wick does not dry out, you can work for a long time without worrying about opening and closing the cap, such as making boosters and pops. The ink uses alcohol-based ink that suppresses odors that are friendly to people. It is economical because it can be used repeatedly because it can be replenished with ink and the wick can be replaced. K-199N Product size: 20.5 x 19.0 x 134.0 mm Weight: 21g Colors: 12 color Quantity: 1/10/360 MOQ: 1pc/each SKU K-199P Refill Core Medium/Round Core (2 Pieces Included) Weight: 10g Quantity: 1/20/240 MOQ: 1pc/each SKU KR-ND Capacity: 3ml x 3 pieces Weight: 10g Colors: 12 color Quantity: 1/20/240 MOQ: 1pc/each SKU