High Tank Toilet Z-pipe Conversion Kit: Our stylish high tank toilet kits transform your existing top-entry toilet bowl into a high tank! May not fit all bowls. We recommend measuring the center to center of the bolt holes. The conversion panel has a two bolt pattern. 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 light oak finish raised panel wood tank, liner, supply line, mounting hardware. Toilet seat & bowl not included. Will require a toilet bowl with a 5 1/2" tank to bowl bolt boring.