Choose this insert if your square fire pit opening measures 36.5–39.5 inches across the inside. The 36 in. Phoenix Square Smokeless Fire Pit Insert adds a clean, architectural look while upgrading an existing brick or block surround for a hotter fire with significantly less smoke. Confirm the Fit Before Ordering Required inside opening: 36.5–39.5 in. square. Installation: Drops into an existing square brick or block surround with no tools required. Also works freestanding: Place it on a suitable non-combustible surface. Please note: Bricks and blocks are not included. Shipping: Free standard shipping to the contiguous United States. Warranty: Three-year limited warranty. Why Choose a Phoenix Smokeless Insert? Less smoke around your guests: Double-wall construction channels preheated air to secondary combustion ports that help burn smoke before it rises. More efficient fires: Elevated airflow supports hotter, more complete combustion so you get more heat from your wood. Modern square profile: Complements contemporary patios and outdoor kitchen layouts. Fast backyard upgrade: Convert an existing fire pit surround without rebuilding it. Built for repeat use: Heavy-duty steel construction is made for year-round outdoor gatherings. Need a different shape or opening size? Compare all available Phoenix smokeless fire pit inserts. California Residents: WARNING – Cancer and Reproductive Harm. www.P65Warnings.ca.gov