Best Quality MTN Gearsmith 12'x12' Two Tier Replacement Garden Gazebo Canopy Top Sun Shade - Green Polymer coating for protection against UV rays from sun and increased durability. Designed and fit for most of square 12'x12' double tier gazebo (not for hexagon gazebo) Anti-rust brass grommet rings to ensure proper water drainage The outer perimeter of the main canopy is 144" x 144". The top tier measures 37" x 37". Velcro straps allow easy installation and attachment to gazebo.