Erasable Ballpoint Pen Body - Black 1 pen + 4 refills

Standard set with a black body. Includes 4 replacement ink cartridges.This is a ballpoint pen that uses friction heat to erase ink, similar to Pilot's Frixion Ball. The line thickness is a standard 0.5mm. It's a side-knock type, where you press the clip on the side to extend the tip, so you don't have to worry about losing a cap. The top has a rubber eraser to erase the ink. Since it erases with friction heat, the key is to rub quickly, not too hard.The product includes one ballpoint pen (black) and four replacement ink cartridges (black).Unlike pencils or mechanical pencils, there's no worry about the lead breaking, and no eraser shavings, so how about it for home study for upper elementary school students and beyond? My two middle school sons love them, and they use these ballpoint pens exclusively for home study and test preparation, except for homework submitted to school. The desks and surrounding areas, which used to be messy with eraser shavings and broken lead, have become very clean since they started using these ballpoint pens, saving me the trouble of cleaning, and I think it's a very good product as a parent.The product will be placed in a plastic bag, then in an envelope, and shipped via standard mail without compensation. If you require packaging or wish to ship via a method other than standard mail, we will charge the difference separately, so please let us know in the comments before purchasing.Additional pens are 100 yen each. Additional replacement ink cartridges (black, blue) are 50 yen each. Please let us know in the comments before purchasing if you would like to add any.We also have many other erasable ballpoint pens for sale. We will offer a discount if you purchase multiple items. Please check the following and contact us in the comments.Features... Erases with rubbingBody material... PlasticOther features... Bulk sale outstanding for everyday use. top-grade materials and excellent craftsmanship ensure long-lasting durability.