A classic in the eraser world: the Staedtler Mars Plastic eraser! 

I've used these erasers since school - the quality is excellent and they last an exceptionally long time when cared for well. I have one that is over 20 years old!

This eraser is medium hardness and is perfect for correcting HB-6B graphite. Staedtler Mars Plastic are latex free and designed for minimal smudging and crumbling. 

Each Staedtler Mars Plastic Eraser measures 6 x 2 x 1cm in size. This listing is for one Eraser.