'Evaporative Cooling Media, Environmental Applications Commercial/Industrial, Height 20-1/2 In., Width 21 In., Depth 1/8 In., Pad Material Aspen/ Mesh, Pad Features Mechanical layering for uniformity in pad thickness and density, Biodegradable stitching which penetrates matting for stability,Each seam runs entire length of pad for strength., Replaces Part No. Champion/Essick 110088, For Use With Champion model WCM28 (1 pad needed); Essick model N28W (1 pad needed)'