TDC-4 is a 4 pack of 1 in. x 4 in. tie down clips that are used to secure a condenser to or a stand. The TDC-4 is Florida Building Code product approved for use in high velocity hurricane zone (HVHZ) areas. These clips are made from heavy duty 12 ga. steel and are G90 galvanized for corrosion resistance. Be sure to place brackets according to local building code requirements.