Precision CNC Machined M12x0.5mm Machined Aluminum Lens Holder. Centered Lens Mount with 22mm hole spacing for Lenses with Short Back Focal Length (BFL). Black Anodized Finish. Ideal for industrial applications, which demands precision rugged components to withstand harsh environment and demands tight tolerances. Ships with mounting hardware. Designed in the USA by M12 Lenses Inc.