Pro Arte’s Prolene Synthetic One Stroke Brush Series 106 is a flat brush which gives you precise, sharp lines for one-stroke work and lettering. It holds colour well and has a good spring. The seamless ferrules are made of nickel and it has a black polished handle with a gold tip. Pro Arte’s incredibly popular Prolene brushes have synthetic polyester bristles, specially developed so that they don’t become charged up with static electricity. This means that they behave like sable, while being more durable and significantly less expensive. They’re ideal if you’re looking for a value-for-money watercolour brush but don’t want to compromise on quality. The Pro Arte Prolene Synthetic One Stroke Brush Series 106 comes in a wide range of sizes to suit all purposes.