Quality Promise: The mixing valve is made of solid brass, which is rust-free and has a long life. The High Quality ABS rain shower head with silicone nozzle allows you to wipe away mineral deposits with just the swipe of your finger; Prevent Scald Valve: The pressure balance valve cartridge monitors water pressure balance to protect you from scald due to sudden changes of pressure of hot or cold water; Ultimate High Pressure Shower: With adoption of innovative air injection technology, the large 12-inch raining sprinkler mixes water with air to increase the water pressure to 100%, and simulates the natural raining to provide you with natural contact of water experience; Prevent Water Hammer: This pressure balance valve has built-in two check valves to effectively eliminate water hammer noise; 100% Satisfaction Guaranteed: If for any reason you are unsatisfied with this shower system, simply contact us, and we'll promptly resolve the issue to your satisfaction. - we're here to make it right for you.