The Auto Extension Tube Set for Nikon 1 mount Camera and lens is a set of two extension tubes for mirrorless interchangeable lens cameras * This set has tubes of 10 mm and 16mm * Material: Metal Bayonet & Plastic Body * Diameter of the tube: 56mm * Compatible with Nikon 1 mount Camera and lens such as J1 J2 J3 V1 V2 S1