One-Stroke White Synthetic Sable Wash Paintbrush - 2.5"/4"
Major Brushes One Stroke Synthetic Wash Artist Paint Brush Large 1.5" 2.5" 4" | eBay
COTTAM Cutting In Paint Brush (2.5") - Short Handled, Angled Paint Brush for Cutting In & Edging Corners While Painting and Decorating : Amazon.co.uk: DIY & Tools