This is an UNUSED, NEW OLD STOCK U-tube and shell heat exchanger. The tube part is made of STAINLESS and the inside STAINLESS tubes are finned to facilitate efficient heat transfer. The tube part is made of carbon steel. /* Main Hollow Cylinder Diameter - 13 */ /* Main Hollow Cylinder Length - 162 */ For sale is a Cooler, Oil for Howden Gas Compressor Heat Exchange ENLIN A/SA182 F304L/304 150 B16,5 S40 4 CB14 Philippines NF 3 300 SA 105 ZP 00 B16 NF 2 150 A-105 GSK 01 B16 1594-A 12 150 B16 SA/A182F304/304L CA9 Korea 1594-A DET -13 HT-L0559