... manufacturer in China. Populace is supplying the heat exchangers for Midea, Gree, TCL, LG, Samsung, Panasonic etc. ... Features:1. Material: copper, aluminium, galvanized plate.2. Copper pipe: diameterΦ7, Φ7.94, Φ9.52, Φ12.7mm, ... 6mm, 31.75x27.5mm, equilateral triangle arrangement.7. Suitable for R134a, R22, R404a, R407c refrigerant and so on. ... . copper tube shell and tube heat exchanger for heat pump