Neewer Adjustable Follow Focus Gear Ring Belt for DSLR Lenses/HDSLR Follow Focus, fits any lens with diameter from 65mm to 105mm Adjustable Flexible Follow Focus Gear Ring Belt Fits any lens with diameter from 65mm to 105mm. Color: Black. Only the ring belt is included Ideal for DSLR Lensed/HDSlR follow focus FF. Special used for follow focus FODSLR brand