What Mack Brush says about their product...
Andrew Mack & Son Brush Company has teamed up with Todd Hanson to create a brush called the "King 13"
We use a 60mm Chinese blue squirrel hair for the 7/0 , 5/0, and 000 giving the brush a total length of 1 3/4″. We use a 64mm hair for the 00, 0, and 1 which gives the brush a total length of 2″. The brush has more pull in the making process giving it a little more taper than a traditional striper. The amount of hair that is distributed onto the handle during the making process is configured differently than our series #10 or #20 brushes. For example, the 00000 and 000 are made on a #00 handle, the 00 is made on a #0 handle, and the 0 is made on a #1 handle. Our technicians are applying the same amount of hair for a say a #00 brush but putting it on a handle that has a larger surface area.