Perfect for artists, architects or anyone who needs help erasing, this 30 pack of super-soft eraser refills are the perfect way to extend the lifespan of your Helix Professional Eraser. Please note that the Helix Professional Hi-Polymer Automatic Battery Powered Eraser Refills work ONLY with Helix item 19060, our Automatic Battery Powered Eraser. The small eraser nub is great for removing small details, and are PVC, Latex & Phthalate free! 30 pack comes with one additional replacement collar for use with Helix Automatic Battery Powered Eraser.