The 30 mm sliding coaxial plate provided by LBTEK consists of two coaxial plates. One is used for fixing in free space or a 30 mm coaxial system, while the other can be moved via a dovetail groove structure with a travel range of ±6 mm. One side of the sliding coaxial plate features four coaxial blind holes (coaxial rods cannot pass through during installation), and the other side has M3 threaded holes where coaxial rods are installed using M3 set screws. The fixed coaxial plate has an SM1 threaded through-hole at its center, allowing installation of optical components up to 3.5 mm thick and 25.4 mm in diameter using SM1R retaining rings. The bottom includes M4 threaded mounting holes for connecting to optical posts. The coaxial plate is engraved with ±6 mm graduation marks for manual positioning. After adjustment, the position can be locked by tightening the top M3 screw. All adjustments are made using a 2 mm hex wrench. Note: The three M2 small screws and the top M3 screw must not be removed to prevent the spherical components from falling out.