This set includes 2 sturdy egress window well covers built to protect basement windows from outdoor debris, small critters, and accidental water damage. Crafted from UV-resistant, impact-resistant polycarbonate that resists yellowing over time, each cover measures 39 in. long and 16 in. wide, with a 1-1/2 in. backstop and 0.18 in. thickness for a secure, tailored fit. It comes with 10 sets of stainless steel mounting clips for simple installation and removal, allowing frequent reuse and easy storage when not in use. The clear polycarbonate design preserves natural sunlight flow into the basement while delivering full protective function, and it needs minimal upkeep, just wipe clean with soap and water to keep it in good working order. Material: Plastic.