The order is one piece 5u(0.005mm) KA300 linear glass scales/linear encoder/linear sensor, travel length are KA300-70mm, KA300-120mm, KA300-170mm, KA300-220mm, KA300-270mm, KA300-320mm, KA300-370mm, KA300-420mm, KA300-470mm, you can choose one piece among them.
