Stainless Steel - Very durable, attractive and easy to clean Leak-proof - All brass pump mechanism provides the best possible performance Simple-Easy to install , use, check soap levels and refill. Also features a tamper/vandal resistant lock Advanced - Specially designed to avoid issues common to other brands of liquid soap dispensers Note: The data is manual measurement, please allow 1-3cm error, due to differences between light and display, there will be a certain color difference, the specific received in kind shall prevail.