Shenzhen Smax Screen Co. Limited as a professional 4k 8foot by 21foot projector screen manufacturer and supplier in China, all the 4k 8foot by 21foot projector screen have passed the international industry certification standards, and you can be completely assured of quality. If you do not find your own Intent 4k 8foot by 21foot projector screen in our product list, you can also contact us, we can provide customized services.