Sash and trim brush. 100% Dyed nylon. Nylon filament provides greater abrasion resistance for increased wearability while its famous Satin-Edge finish gives excellent painting performance. Each nylon brush is formulated with varying lengths and taper ratios that assure proper tool flexibility. Used with all paints, nylon brushes provide excellent paint lift and smooth application. Purdy 080215 1-1/2 Professional Nylox-Dale Paint Brush - Only 100% SRT Tynex???, tipped and flagged to give greater lift and hold, plus greater control. Nylox filament provides increased wearability. Each Nylox brush is formulated with varying lengths and taper ratios to assure proper brush flex