Product Features: 1. Fully submersible. 2. Universal heater for marine, freshwater or tropical aquariums Submersible Aquarium Heaters are made from thermal shatter-resistant quartz glass and were designed to absorb impacts, making them extremely durable. A power indicator light turns on when the unit is heating, Can be positioned at a vertical or horizontal angle. Can be used in fresh or saltwater fish tanks. Size: 200W-34CM,300W-40CM,500W-45CM Package contains ·1 x heater with 2 x suckers ►After receiving the goods, if there are any missing parts, please contact us in time, we will resend it to you as soon as possible. ►Because of different spotlights and different screen colors, actual objects may have a certain color difference, which is normal ►Manual measurement of product size may have an error of 1-3cm, and the delivery time is usually 10-25 days. ►If you have not received your order within 30 days, please contact us in time. If you are not satisfied with the product, please contact us and we will be happy to help you. If you are satisfied with our products, please remember to give us 5 stars.