advantage of oil radiator for plastic packing machine 1.good heat conduction 2.long service life 3.nice appearance ... and so on. Materials: Cooper, aluminum, carbon, stainless steel: 201, 304, 316, 316L, Steel tube specification: 21*2.0, 22*2.0 ... , 18*2.0, 25*2.0, and so on. Steel tape specification: 10*0.3, 12*0.3, 15*0 ...