This is a 6inch half dome lid made of high-quality polycarbonate material, similar to a plastic glass dome, but with shatter resistant and scratch resistant, and higher hardness. The mold for this optical dome cover meets high-precision optical standards and is produced in a dust-free injection molding workshop with excellent optical performance. It's suitable for external use and beautifully made. Dome PC cover can be used in many applications from CCTV camera dome replacement, drone lens protection, skylight, food cover, product displays, dog & cat bubble windows, home decoration, crafts, underwater devices and more.