Harpic Flushmatic Toilet Cleaning In-Cistern Block is a drop-in tank tablet that can be used for any accessible cistern. It works by creating strong foam every time you flush the toilet, which helps to maintain the cleanliness & freshness in the toilet bowl.

Usage Direction: 1. Open It - Remove the block from the packet. Do not remove the plastic covering. 2. Drop It - Drop the block into the cistern/tank but away from the water inlet. 3. Flush It - To activate, wait for 10 minutes before the first flush. 4. Forget It - Replace the block when the color disappears.