The Eagle Group A208513 Bus Box/Tub Cover features a durable molded fiberglass construction, measuring 25-3/4"W x 17-3/4"D. Made from thermoset polyester composite material, this lid is both flame and chemical resistant, ensuring long-lasting performance in demanding environments. It is designed to fit models A208506, A208507, and A208508, providing a secure and reliable cover for your bus box or tub.