Tender For supply of opto mechanical components : - 1 inch polarizer rotator mount , 1 inch kinematic mounts with maximum aperture - 2 knob , 2 inch kinematic mounts with maximum aperture - 2 knob , 1 inch kinematic mounts with maximum aperture and translation - 3 knob , 2 inch kinematic mounts with maximum aperture and translation - 3 knob , 1 inch cube - prism mounts , 2 inch cube - prism mounts , variable round aperture 12 mm along with aperture mount , variable round aperture 50 mm along with aperture mount , standard h-type post bases - double side slot