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6 inch aluminum pneumatic expanding shaft
6 inch aluminum pneumatic expanding shaft
6 inch aluminum pneumatic expanding shaft is a bigger diameter expanding shaft, it is made with aluminum material. This aluminum pneumatic expanding shaft is light and durable.

6 inch aluminum pneumatic expanding shaft can be made with key and strip two types. After inputting air source, keys and strips will be expanded out to hold paper core tightly for winding and unwinding. When exhausting air source, then keys and strips will be shrinked into shaft body, so it is easy for paper core taking out.
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