Check the listing for details. Newport RSP-1 Rotary stage. Condition: Used. Listed at 80.00 USD. Newport RSP-1 Rotation StageAs per the Newport Website: This product features full ball bearing races, provides exceptionally smooth and continuous angular positioning for 1 inch (25.4 mm) diameter optics or components. A delrin retaining ring is provided to secure the optic. The rotating platform has six 8-32 and six M4 threaded holes for added mounting flexibility. It has an internal thread that enables Newport Glan-laser calcite polarizers and CH Series cube beamsplitter holders to be rotated in this stage. Polarizers or wave plates can be coarsely aligned using the knurled edge of the rotating platform while fine adjustment is achieved with the knob. Angular position is indicated on a 360 ° scale graduated in 2 deg increments. The adjustment knob can be securely locked by tightening the screw in the end of the knob. Used in working condition No returns