The DIALIGHT part 101-0931 Round Optical Lens is a high-quality lens made from durable red plastic. This lens is specifically designed to fit perfectly with compatible DIALIGHT products, providing optimal lighting performance. It offers a clear and focused red light output, making it suitable for a range of applications including signaling, indicator lights, and warning devices. With its robust construction and reliable performance, this round optical lens is a cost-effective solution for any lighting project.