Nylon 6 spheres are natural coloured and are often used as a replacement for steel and metal. It is a tough material making it suitable for machining and considered as an engineering resin. The spheres show resistance to abrasion and many chemicals, and they are generally used for strength and impact resistance. Additionally, these balls are an excellent choice for applications that require a lightweight, resilient and abrasion-resistant material that performs well in hot, chemically aggressive and humid environments. Used without lubrication, these balls provide greater toughness and ductility than most plastics.