Coway Bidets are the market leader in features, efficiency and cost. Building and designing bidets since 1989, they have over 25 years of experience and have consistently turned out new models with incredible features. We believe that Coway bidets are the pinnacle in bidet design. We feel that they provide the best value for money as well as the best features which has been backed up by critical acclaim. Coway bidets have been voted the best in the world, two years running at the World Design Awards . The Coway BA13 bidet leads the market with its on the mark features, product efficiency and comparable cost. This Coway bidet has won the Red Dot Design award two years in a row and consistently provides reliable products. Eco R-500B Elongated. A: 480mm or above B: Between 130-200mm C: 310mm or above D: 400mm or above