This gas-operated hot water heater knob is a perfect fit for AO Smith GDHE-50 model. The knob is specifically designed to control the temperature of your water heater, making it an essential component to ensure a comfortable shower experience. The knob's sleek black color seamlessly fits with the heater's aesthetic, giving your bathroom a polished look.Crafted by A.O. Smith, one of the leading manufacturers of water heating solutions, this knob guarantees top-notch quality and longevity. It is an ideal replacement part for your existing heater knob, ensuring the continued efficient operation of your hot water system. Purchase this essential component today and enjoy the convenience of your hot water shower without any hassle.