High Precision Metal M39 to M42 Screw Lens Mount Adapter Step Up Ring Metal Step Up Screw Mount M39 Lens to M42 39mm to 42mm Adapter Ring Features: 1. It is suitable for the mirror change or the kind of mirror, which is exquisite and compact and is convenient and practical. 2. Aluminum Alloy inner, outer matte paint. 3. The M39 lens turns to the M42 adpter ring, and it can also be used with the M42 lens to connect the other card body with the fuselage, so as to achieve the effect of the M39 transfer to the other adapter frame. Specifications: Material: Metal Color: Black Note: Please allow 1-3cm differs due to manual measurement. Due to the different display and different light, the picture may not show the actual color of the item. Thanks for your understanding. Included: 1 x 39mm to 42mm Adapter Ring 1. It is suitable for the mirror change or the kind of mirror, which is exquisite and compact and is convenient and practical. 2. Aluminum Alloy inner, outer matte paint. 3. The M39 lens turns to the M42 adpter ring, and it can also be used with the M42 lens to connect the other card body with the fuselage, so as to achieve the effect of the M39 transfer to the other adapter frame. Specifications: Material: Metal