The item in the picture is not what you actually get
The picture depicts wide (7 mm wide x 37 mm long) erasers that almost fill the width of the tube. This is actually a picture of PaperMate item 64892. What you get if you order this product is item 64891 (about 4 mm wide x 14 mm long, with a metal retaining clip), which is NOT INTERCHANGEABLE with 64892.