... Thickness:100,150,200,300mm fengrui evaporative cooling pad wall systems Model no.: 5090 Features: 1) H: 1,500mm, 1,800mm ... evaporative surface for heating exchanging between weather and air4) Outer frame can be ale of aluum alloy, PVC and gaed boardCooliuch ... indoor air in working environment. fengrui evaporative cooling pad wall systems