I am selling this because I mistakenly used the wrong wattage heater and cannot use it. This product is compatible with 40W to 60W heaters. The cover simply hooks on, making installation easy. It is compatible with both external and internal installations, so you can use it according to your heater's usage situation. [Precautions for Use] ★The Heater Hug Cover can be used when the heater is placed vertically. (It is not compatible with horizontal heater placement.) ★Please install the Bird Warm Deck close to the ceiling of the Heater Hug Cover. If installed far away, the Bird Warm Deck may not warm sufficiently. [Temperature Approximately 50 mm above the Bird Warm Deck] ●Approximately 30°C when using a 60W heater. ●Approximately 25°C when using a 40W heater. *The temperatures listed above are when the Heater Hug Cover and Bird Warm Deck are installed in close contact. *Temperature differences may occur depending on installation conditions. *Please adjust the placement of the Bird Warm Deck or refrain from using the heater according to your bird's physical condition. [Product Information] Manufacturer: HOEI (Toyo Ei Kinzoku Kogyo Co., Ltd.) Product Size: Deck Size: Approx. W150 x D110 x H60mm Cover Size: Approx. W140 x D120 x H220mm Specifications: Heater Hug Cover: Iron Bird Warm Deck: Natural Wood Screws: Steel