Zonon Direct Vent Horizontal Square Termination Cap 4 x 6-5/8, Heavy Duty Galvanized Steel Exhaust Cap for Fireplace, Stove and Boiler Venting Weather Resistant Heavy Duty Construction: crafted from thickened 0.04 inch galvanized steel, this horizontal square termination cap offers better strength and rust resistance. The rear round vent features 0.07 inch thick 201 stainless steel-far more durable than typical 0.02 inch versions on the market. Designed to withstand pressure during transport or installation without denting or deformation Universal Fit: this square vent cap measures 13.5 x 13.5 inches with an overall height of 12.6 inches. The circular vent opening is 6.5 inches in diameter and 5.7 inches high. Weighing 12.8 lbs, it's suitable for most standard rooftop and wall duct terminations Upgraded for Long-Term Durability: reinforced with thicker galvanized steel and double-welded edges on all sides. Stress-prone areas are specially enhanced to prevent bending, rusting, or punctures. The round vent is upgraded to a 0.07-inch thick structure for enhanced mechanical resistance while maintaining efficient airflow?ideal for both harsh weather and heavy-duty commercial use Quick and Secure Installation: comes with 12 pre-drilled mounting holes-3 on each side-and includes a complete screw set. The enlarged hole design allows for faster, more convenient installation. Built to stay firmly in place, the heavy-duty structure resists wind and impact after installation Versatile Applications: specifically designed for HVAC and exhaust systems, this terminal cap prevents rain, debris, and pests from entering the duct while allowing steady airflow. Built with rust-resistant galvanized steel, it's ideal for residential, commercial, and industrial settings?especially in humid or coastal environments