Except the down framework, the transmission parts and some parts
that must be made of special materials. Other spare parts are made
of stainless steel 304.
The gripper is made of stainless steel, the position where hold the
bottleneck is also made of stainless steel, compared with the
traditional rubber gripper, it is much hygiene, durable, and no
quick-wear parts, the screw parts of the bottleneck can avoid being
polluted by the rubber gripper.