EZ Flow One-Metal Retainer Continuous filament spun glass media For residential & light commercial applications One-piece moisture-resistant chipboard frame prevents open corners Corrosion resistant metal grille on downstream side of the filter. Media and grille continuously glued to the inside perimeter of the frame for rigidity. Hot melt resin sealant UL 900 Class 2 marked $10 per order for Shipping & Handling will be added on during check out with Paypal. All orders are sent UPS Ground. Below please enter the exact dimensions of the filter you want up the surface area. Example 10.5 x 10.5 = 110.25 surface area. 10ŕ/2" x 10ŕ/2" = 110.25 surface area.