The 1.5” (37mm) oval paint brush is a professional polyester/nylon brush for use with all paints for both interior and exterior painting. We only use the highest quality filaments which makes this brush extremely durable and effective for precise edging. You will be able to cut-in faster and more accurately as the brush releases paint smoothly and evenly. The filaments are designed to provide a smooth, no streak finish while providing exceptional coverage. This angular brush size is best suited for windows and smaller trim such as shutters, mouldings, baseboards and smaller furniture.