T PENCIL ERASER PVC-FREE ERASER

Traditional T Pencil Erasers:
These are small erasers typically made of vinyl or rubber that come attached to the top of a T Pencil.
It’s possible that you’re looking at a bulk pack of just the eraser refills (without the T Pencil itself)

This wouldn’t be uncommon, as some pencil companies might sell replacement erasers for their T Pencils.
Erasers Designed for T Pencils:
There might be eraser refills specifically designed to fit the mechanism of T Pencils from a particular brand.
These erasers could be shaped differently than traditional T Pencil erasers