*AmerKleen M80 Pad 24 x 24 x 4'''' (20/Ctn) *EN779: G3 *ASHRAE 52.2: MERV 5 *Media Type: Fibreglass *Rated Initial Resistance: 75Pa *Recommended Final Resistance: 250 PA *Max Operating Temperature: 100°C – 170°C *Size (WxHxD): 24x24x4''