In Stock Cleaning Products Duck Lutr Aqua Burst 50ml x 6 Duck 735262 ¥3,421 Duck Liquid Rim Block Marine lasts up to 300 flushes. Duck Liquid Rim Block keeps your toilet clean with every flush. 1. Cleans with every flush. 2. Foaming action. 3. Freshens. 4. Lasts up to 300 flushes. Cleans, freshens and fight stains. Add to cart