Flexpad made in the U.S.A   6" x 1 1/2" with 14mm thread

150mm  Softie.  The blue softie foam density is the softest pad available. It is used of shaping foam and works great when shaping concaves and channels. Maximum RPM 750.

150mm Soft. This is a very popular all Yellow Foam SOFT sanding pad. It is used for finish sanding.  It's soft, so you have to run it slower.

150mm Medium. Use the Red/White MEDIUM FLEXPAD after you use the Orange Hard pad with a lighter sandpaper to get scratches out of your work. This is a great all around sanding pad. The flex is between the soft and hard pad.

150mm Hard. The Orange/White Flexpad is tough. Used for rough sanding. You can flatten the bumps, grind fin boxes and glass fins with this pad, no problems. A good Boat Builders sanding pad.