Clear polycarbonate semicircular (round-flat) window well cover for narrow projection wells. Flexes to overlap the rim of a half-round well, then clamps into place with the included spring clips to keep rain, snow, leaves, and small animals out while letting daylight through.

• Cover size: 40" wide x 17" projection
• Fits round/semicircular wells ranging 35" to 40" wide x 15" to 17" deep
• Style: Round Flat (semicircle, not domed)
• Molded back bar with steel insert for support against the foundation
• Mounting clips and instructions included; typical install ~10 minutes
• Clear polycarbonate construction for natural light to the basement window
• Model WW4017CM

Best for: narrow stamped-steel half-round window wells common in 1960s-1990s ranch and split-level basements where the rim sticks out only 15 to 17 inches from the foundation.

Tip: Measure the rim outside-to-outside across the foundation wall (width) and from the foundation out to the far edge (projection) -- not the visible opening of the basement window -- when checking fit.