MasterCool 12 inch Rigid Media Pad for 4800 CFM, 110133-3 Made with premium CELdek media Easily installed in your existing evaporative cooler Strong and durable construction with a multi-layer design for higher efficiency. Multi-layer design for a higher efficiency rating and a stronger, more durable construction GREENGUARD Certified by Munters guarenteeing no harmful emissions are present Dimensions: 22.88 x 41.25 x 12 inches.