Cork Block- Used with all types of sandpaper and finishing paper for a level sanding job. 4"x2"x1"
Felt Block. Semi-hard felt, recommended for fine hand rubbing on all finishes. 4"x2"x1"
Rubber Block- Designed to fit the hand comfortably, this Rubber Block is Always a flat surface. It will never swell or warp when wet, and never shallow out a repair. 3 3/4"x 2"x1"