This solid brass wall mount tide clock features a quartz movement, thick glass and the clock has a 7½” diameter. Please note that due to the Pacific Oceans irregular tide patterns, tide clocks located on the Pacific coast will need to be reset more often. This nautical tide clock makes the perfect addition to your nautical home decor. It could help turn that special area in your nautical home or office into your own beach house, coastal themed area. They also make a great nautical gifts, a beautiful piece of coastal decor, a nice piece of nautical wall art as well as being a great addition to your nautical decoration.