Formed of two acrylic sheets, partially filled with fiberglass and resin for added durability. Factory-calibrated comfort setting at 104 degrees Fahrenheit. Ceramic cartridge. Volume control trim: 5.25" H x 4.375" W x 3.875" D. Thermostatic trim: 6.75" H x 6.75" W x 7" D. Intended for use with a thermostatic valve and trim. Thermostatic technology keeps shower temperature within 1 degree Celsius. Bronze valve body. Zinc alloy die-cast posts. Mounting hardware included. 18" towel bar has a towel holder length of 15.75". All metal construction. Pivot open design.