This is a replacement rubber ball for the overflow rod of a Stir Blitz toilet cistern. It is fitted to restore a proper seal when the original ball has worn down. Its soft rubber composition lets it mould itself to the seat, compensating for limescale build-up or surface imperfections.

• Fits Stir Blitz overflow rod
• Soft rubber adapts to limescale imperfections
• Used to re-seal the overflow mechanism