Modern Fuel Mechanical Pencil Eraser Refill (20 pack)

All 20 erasers would equate to about 5 normal length erasers. At $10 for that many, they are about as expensive as gold! They are the right diameter to fit my pencil but since they are so short, they START at less than the length about where my regular erasers quit. So I have to add a filler to get these erasers up to the top of my mechanical pencil. I will be able to use about half of one, maybe, before it falls out! Waste of money!

Very nice.