I bought these pens on a whim @ $10.99 on Amazon because I wanted to try piston-fill fountain pens. I bought the Extra Fine (EF) but they write more like a Fine (F). They aren't the prettiest pens you'll own, but they write beautifully and have a HUGE ink resevoir. I honestly can't even predict how long it can go without being refilled. They come in a nice box and are suitable for gifting. They are currently $8.99 and Prime Day on Amazon is coming up on the 16th. BTW, I've discovered that Prime Day lasts 36 hours, not 24. At this price, I highly recommend these pens by Yakura. They won't replace your favorite Waterman, but they're excellent for the price. Use my link and it makes a donation to the Big Cat Rescue, a sanctuary for big cats formerly abused or kept as pets.