... : brown, green, black 3) Good price and quality 7090 corrosion-resistant cooling pad1) High hygroscopicity 2) Color: brown, green, ... Evaporative cooling pad with first class quality, 5090/7090 corrosion-resistant cooling pad for greenhouse, workshops,big farms etc ... and quality for every customer.Made from hydroscopicity kraft paper, anti-corrosion, usable life, ripple height: 7mm, ripple angle: 45 ...