Blue-black-red-green excellent writing quality, vivid colors suitable for all kinds of pencils, affordable price advantage long-term writing convenience, easy to clean, easy to wipe off from slippery surfaces. about the product whiteboards are the most widely used products for studies and announcements in educational institutions and other workplaces. blackboard pens are also required to write on these boards. Since these pens are used frequently, their ink runs out quickly and you have to buy a new one every time. however, if you get brons pen ink, you can refill your pens and write for a long time. marker ink, which never dries out and is not damaged as long as you keep the cap closed, is easily cleaned from slippery surfaces such as wood. it allows you to erase your writings with the help of an eraser without leaving a trace and work again. maximum 10 pieces of this product can be ordered. swordslife reserves the right to cancel orders over 10 units. more than 10 stocks are offered 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.