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Roller base is a device for liquid nitrogen tanks’easy movement. This product has various different models for different size of liquid nitrogen tank. When operator needs to move a tank to other place, the liquid nitrogen tank with full samples is not light weight and not labor-saving, then it is a good time to have a roller base. It mainly has two types: four wheels and five wheels, and differ to different tanks’size. Five-wheel roller base is more robust than four-wheel one, but usually four-wheel roller base is enough for users’demand. It has advantages of high-quality durable structure, convenient casters, various models and easy operation. It is suitable for small or medium size liquid nitrogen tanks’transportation.