Trumony aluminum limited can provide battery cooling snake tube for 18650 cells, 21700 batteries and 4680 battery module pack. To enlarge the cooling area .The snake cooling tubes are made by aluminum extrusion, bending and snake shaped forming via toolings. We can customize the serpentine tube as your battery module layout and ev battery pack baundary size .Except the aluminum cooling pipe, we provide the water cooling plate, aluminum micro channels and roll bonded plate.