Pre-order item Adopts a special alcohol-based ink that is resistant to drying and suppresses odors. You can write for a long time, and even if you forget to close the cap, it will not dry out for about 3 days. It can be used repeatedly for ink replenishment and pen core replacement, which helps save resources. The ben core is made of polyester that does not scratch the surface of the whiteboard. using fiber. K-529 Product size: 20.5 x 19.0 x 134.0 mm Weight: 20g Colors: 4 color Quantity: 1/10/360 MOQ: 1pc/each SKU K-529/4W Product size: 78.0 x 23.0 x 140.0 mm Weight: 100g Quantity: 1/48 MOQ: 1pc/each SKU K-529P Refill angle core (2 pieces) Quantity: 1/20/240 MOQ: 1pc/each SKU KR-NDW Capacity: 3ml*3 Product size: 60.0 x 16.0 x 115.0 mm Weight: 10g Colors: 4 color Quantity: 1/20/240 MOQ: 1pc/each SKU