https://www.ebay.com/sch/i.html?_nkw=Accumulair+Diamond+4+Inch+Merv+13+Air+Filter+Furnace+Filters+2+Pack+&_sacat=0&_dmd=2

Accumulair Diamond 4-Inch Merv 13 Air Filter/Furnace Filters (2 Pack)

Regular price
$124.00
Sale price
$78.00

This filter is 30x36x4 with an actual size of 29.5x35.5x3.75. It comes 2 in a pack. The Accumulair�1/2��1/2�1/2�reg; Diamond with its MERV 13 rating is one of the highest efficiency filters on the market! Efficiency designed to meet the air filtration efficiency criteria required to gain points toward certification in the Leadership in Energy and Environmental Design (LEEDs) Green Building rating system. Electrostatically charged filter media captures airborne