High Quality --- Made of ABS material, weather-resistant, the surface is smooth and durable. It provides a fixed groove with snap tabs for weather-proof brush strip, firmly fix the brush strip. Size & Application --- Outer Size 9.25" x 9.92" x 2.16"(W x H X D), Inner size:7.08" x 7.48"(W x H), Cut-Out Size: 7.7" x 8.3" (W x H), suitable for installation on doors and thin walls, suitable for cat lighter than 17.64 lb and waist circumference shorter than 23" Improved Weather.