The conversation to introduce a liner and scroller/pinstriper brush to the Alpha 6 Brush line was discussed for quite a while before it finally became a reality. We tried many different blends of hair whether it is natural, mixed or full synthetic. We decided on a full synthetic hair brush. This is the latest and greatest synthetic on the market today! It is unusual in the fact that it absorbs the paint and flows off the fibers in a controlled manner. This hair absorbs like a sponge. Included sizes: 0, 00 and 000.