eraser refills

Aha! I've been using the wrong search terms.

Thank you!

Edit: According to amazon, this product fits all Pilot push pencils:

https://www.amazon.com/Pilot-70001-MS-10-Eraser-Refill/dp/B002ZZ5HWY/

"Fits All Pilot Mechanical Pencils. Does not fit the Dr. Grip 4+1 Pen/Pencil combo"