The GR_A Aluminum Rear Housing Case is a replacement part specifically designed for Apple iMac 21.5" models from Mid 2017 and 2019 4K. Made of high-quality aluminum, this housing case is durable and provides a sleek and professional look for your computer. Crafted in China by Apple, this product ensures a perfect fit and compatibility with your iMac model, allowing for easy installation and maintenance. Upgrade or repair your iMac with this reliable rear housing case to keep your device looking and functioning like new.