Escoda Prado 3150 Oil & Acrylic Tame Synthetic Sable Paint Brush Bright; Size 4 Prado 3150 Bright Size 4 has a brush head that measures about 3.87mm Wide x 8mm Long Tame is one of the most valued synthetic fibers because of its similarity to sable hair, imitating its color, spring & absorption of liquids and due to it's perfect combination of three different diameters and three lengths in the fibers, the brushstroke result is the same as one made of natural hair Escoda brushes boast trademarked tripled crimped ferrule ensuring a lifetime secure fit, unique curing process that locks each hair in place creating a permanent brush shape and all wooden handles are ergonomially designed and made from the finest brich wood available Escoda's ISO 9001/100 Cerification ensures that each brush is engineered and hand crafted to exacting standards and is supported by Escoda's Lifetime Guarantee against workmanship defect if purchased from an authorized dealer Since fine art brushes are hand crafted, please expect some variation to the listed dimensions