(6) Andrew Mack Brush Hannukaine Quill Brushes Series 79 Size XXS - XL Mixture Squirrel Taklon Andrew Mack John Hannukaine Quill Series Brush Set is made up of six (6) brushes. Bristles are a mixture of squirrel and taklon hair. XXS - Similar to a Size #2 Graduated Quill. XS - Similar to a Size #3 Graduated Quill. S - Similar to a Size #4 Graduated Quill. M - Similar to a Size #6 Graduated Quill. L - Similar to a Size #8 Graduated Quill. XL - Similar to a Size #10 Graduated Quill.