Our Cooling Coils fabricated from 5/81/2 OD (SS-304 tubes) fully covered by continuous sine wave aluminum fin collars. The selection & construction of coils is through our CAD/CAM system, which is a unique feature of our advanced technology. The tube to fin contact is excellent through our modern tube expansion equipment, which ultimately makes high efficiency heat transfer coils. The entire coil bundle is tested for 21 kg/cm 2 pneumatic pressure.