Princeton Neptune Watercolor Brush - Quill #6 Princton Brush Co. from $23.48 $51.45 Qty. Add to Cart SKU: PB4750Q-6 This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. Brush head is Approx 1/2" Wide and 1-1/2" long. Handle is 6" long. Tweet