Evaporative Cooling Media, Environmental Applications Residential/Commercial/Industrial, Height 21 in, Width 13 in, Depth 1/8 in, Pad Material Aspen, 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 110087, For Use With Champion model WCM28 (2 pads needed);Essick model N28W (2 pads needed)