The top screw knob can be fixed when the polarizer is turned to the optimal position to ensure precise positioning；The components can be fixed easily with the threaded rings and industrial plastic rings ,without any damage to the components.
| Suitable for optical components with a diameter of 25.4mm and a maximum thickness of 7mm； |
| The upper screw knob can be rotated 360° by hand after it is loosened； |
| There is one mark every 1°, a longer mark every 10°, and a number mark every 20°； |
| The application of clearance oil can realize such effect that the screw clearance can almost be negligible； |
| Tilt adjustment range: ±3.5°； |
| In the product, there is a threaded ring. |
