The Blackwing Replacement Eraser is available for order on-line and in-store at Dromgoole's. Hack your Blackwing pencil and give it a custom look with Blackwing erasers.
The Pentel Lead Hi-Polymer .5mm H is available for order on-line and in-store at Dromgoole's.Pentel Super Hi-Polymer 0.5mm h lead resists breaking and never needs sharpening - fits all 0.5mm mechanical pencils.