10-inch dome keeps seed and birds dry. Fits all 2-1/2-inch diameter tube feeders, including droll yankees a-6 series, th series and new generation series. Uv stabilized polycarbonate is durable and resists the sun"s rays. Includes a spring clamp to hold in place. Lifetime warranty against squirrel damage. Made in the usa. Dimensions: 10 by 10 by 4 (assembled). Mounting: dome fits directly on feeder tube. Construction: uv stabilized polycarbonate. Mfg warranty: lifetime warranty against squirrel damage.