Medium No. 3 is a thicker medium than No. 2. It is for painters who like a heavier, more viscous, medium. It is ideal for artists who paint in many layers. The artist begins with Medium No. 1, then uses Medium No. 2, then finally Medium No. 3.  This product is marked as a dangerous/hazardous item. Due to this fact, extra freight charges will be calculated upon check out.