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The Arroworthy Classic Round Sash Nylyn 18 mm paint brush is a precision tool designed for professional decorators and serious DIY enthusiasts. With its narrow 18 mm width and a round sash profile, the brush is ideal for painting delicate features such as staircase spindles, sash window frames, narrow mouldings, railings and detailed trims. :contentReference[oaicite:1]{index=1}

It features Nylyn™ technology synthetic filaments which excel at picking up more paint, holding it securely and releasing it smoothly—resulting in faster application and a cleaner finish. :contentReference[oaicite:2]{index=2} The hand‑crafted construction includes a long wooden handle and stainless steel ferrule for comfort, control and durability on every job. :contentReference[oaicite:3]{index=3}

This brush is compatible with both water‑based and oil‑based paints, stains and varnishes, making it a versatile addition to any decorating toolkit. Whether you’re working indoors or outdoors, the Round Sash Nylyn 18 mm delivers precision and professional results. :contentReference[oaicite:4]{index=4}

Specifications

Type: Round sash paint brush
Width: 18 mm
Filament Technology: Nylyn™ synthetic filaments
Handle: Long wooden handle
Ferrule: Stainless steel
Suitable For: Water‑based paints, oil‑based paints, stains, varnishes, sash windows, spindles, railings

Key Features

• 18 mm width tailored for narrow frames and detailed work
• Round sash design gives excellent access to curved profiles and tight spaces
• Nylyn™ bristles for superior paint loading and smooth stroke
• Hand‑crafted build with high‑quality materials for professional use
• Compatible with both water‑based and oil‑based coatings—ideal for trade professionals and DIY users