Uneesponge By Uneeda sanding supplies.  1/2" sanding sponge. Simple the best abrasives on the market.  Made by professionals for professionals.

These silicon carbide UNEESPONGES are soft and flexible sponges and are specifically designed for finishing wood, metal, fiberglass and sealer with little to no shedding.

They excel at sanding all types of intricate profiles and corners and can be washed and reused again and again.