... hydrophilic or bare 3.fin type: louver fin or corrugated fin or flat fin 4.copper pipe: ... diameter 7mm /8mm/9.52mm: Row and Hole Pitch - 25*21.65mm for each, and ... single fan, double fan, triple fan and fourfold fan, heat exchange surface ranges from ... refrigerating industry, cold rooms, refrigeratories, freezers and other cooling systems. Note: we can ...