Note that this pen only has a dropper. it is not suitable for the cartridge/converter filling system. there is a very nice filling device next to the pen. i love this dropper because it has a "needle tip" that makes it easy to lower the ink into the barrel with minimal mess. swordslife reserves the right to cancel orders over 10 units. more than 50 stocks are available to be sold at the campaign price. the seller determines the selling price of the product you have examined. a product can be sold by more than one seller. sellers of products offered for sale by more than one seller are listed according to the price they set for the product, seller ratings, delivery status, promotions on the products, whether the cargo is free or not, whether the products can be delivered with fast delivery, and the stock and categories of the products. Improved version for clearer understanding and better search visibility. Suitable for users seeking detailed and reliable product information.