ITEM NAME:Rubber Follow Focus ring gear belt with plug in aluminum alloy for SLR camerB9A9 Rubber Follow Focus ring gear belt with plug in aluminum alloy for SLR camerB9A9 High quality aluminum alloy handle, durable. Adjustable and flexible. easy to work and convenient for installation. Material: Aluminum Alloy & ABS Color:Black Slip design and smooth design there is no harm in your camera. Special uses for follow focus. Suitable for any lens with a 52mm diameter is 86mm (2.0-3.4in). suitable for most cases shooting. Module Gear: Over 0.8 standard Film Industry Total length: approx 37cm / 14.6 Weight: 28g / 0.95 oz package includes: 1 x adjustable speed belt 1 x ring handle aluminum alloy Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing.The measurement allowed error is +/-1-3 cm..High quality aluminum alloy handle, durable. Material: Aluminum Alloy & ABS. 1 x ring handle aluminum alloy. Special uses for follow focus. 1 x adjustable speed belt. Module Gear: Over 0.8 standard Film Industry.