Nylon (Polyamide) Balls
Nylon balls are an environmentally-friendly choice due to how they are made and that they are reusable.
Nylon balls are insoluble in diluted mineral acids and most organic acids, and common solvents. They are exceptionally resistant to alkalis, petroleum oil and greases at temperatures up to 300°F. Acids such as lactic acid, photographic solutions, etc., have little or no effect.
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.