["Description: brand new and high quality Feature: Made of high-quality metal material, durable, firm and stable for us to use. The all-metal adapter is designed to fit the lens securely, yet can still be removed easily when not needed. This adapter ring attaches between the lens and the camera and enables a M12 Board Camera to be mounted onto an CS Mount Lens. M12-C or CS Mount Lens Converter Ring only, other accessories demo in the picture is not included! Specifications: Item Type: M12-C or CS Mount Lens Converter Ring Material: Metal Height: 9mm or 0.3in Diameter: 30mm or 1.1in Color: Black for: for CS or C mount lens, for M12 Quantity: 1 Pc Note: No retail package. Transition: 1cm=10mm=0.39inch Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Includes: 1 x M12-C or CS Mount Lens Converter Ring"] Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.