■The iris diaphragm holder is used to adjust and change the diameter of the laser beam.It is a product to use for the pupil part of the optical system. ■The opening diameter can be changed by adjusting the adjustment lever to the left and right. ■The opening diameter can be adjusted according to the scale scale on the side of the main body. ■Since the adjustment lever has a clamp function, it can be fixed at a fixed position. ■For standard products, φ12 L = 60 stainless steel pole is equipped. ■We also support changes in pole length in the range of cataloged articles (L = 20 to 120).