High Tank Toilet Conversion Kit with Z-pipe: Our stylish Mahogany High Tank Toilet Conversion Kits will transform most existing top-entry toilet bowl into a high tank! We've updated the materials and components with 21st century technology. All tanks are a water-saving 1.6 gallons per flush. Ready to install with all mounting parts, includes mahogany finish raised panel wood tank, liner, supply line, mounting hardware. Toilet seat and bowl not included. Existing bowl that is used must have bolt boring of 5 1/2".