*** FREE SHIPPING to lower 48 *** Up for sale is a NEW USA made Southwark Metals 24"x24"x4" filter base, as pictured. This filter base is brand new in the box, ready for installation. If you have any questions, please feel free to ask. Thanks! PLEASE NOTE: Top base dimensions are approximately 24-1/2" wide and 28-1/2" deep. Additionally, this will accommodate either a 1" thick filter or 2" thick filter. TASAL