The SB12 is a custom molded soft yellow shaping-sanding block that uses a Velcro hook system to attach our hook & loop 4 1/2" x 11" Indasa sandpaper or Abranet sand screen found in the abrasive section.
The block is 4 1/2" x 11" x 1 1/8".
It's a super flexible block and won't distort after use.