... one of the largest AC & heat pumps heat exchanger manufacturer in China as well as high quality metal cabinet, copper tube and heat pumps manufacturer in ... .5x11.6mm, 31.75x27.5mm, equilateral triangle arrangement.7. Suitable for R134a, R22, R404a, R407c refrigerant and so on. Series 1Series ... products and perfect delivery date. copper tube shell and tube heat exchanger for air conditioner