These specially designed Japanese nibs were created to ensure perfecting blending and coloring. The brush nib is super-soft and gives the user a paint brush feel. It is perfect for bigger color gradations and seamless blends. The bullet nib is a firm nib, great for outlining, drawing and filling in small areas with precision coloring. The mixing chamber nib while durable, it needs to be removed when refilling the mixing chamber, over time they may get damaged or worn but can easily and affordably be replaced when needed. Each set includes ten nibs.