Size: 180mm x 160mm Color: Black Material: Metal Package Content: 1 x Macro PTZ 1. Specifications: Aluminum four-way macro focusing slide. Features a 1/4-inch standard screw that fits most Nikon, Minolta, and Pentax macro and bellows macro lens extension tubes or macro lenses such as Canon FD and FL. 2. Four Directions: The four-way macro focus slide rail can be adjusted in four directions through two rotary knobs: forward, backward, left, and right. (Please tighten the knob after adjustment to prevent the camera from moving slightly.) 3. Quality Assurance: The slide rail features a sturdy and durable aluminum sliding block with a gear transmission system to improve accuracy. The locking knob ensures secure focus positioning. 4. Focus Adjustment: The focus guide is an essential accessory for macro photography, enabling precise distance modification and stable camera positioning. The smooth rack and pinion movement allows for fine and accurate focus control.