Manfrotto 2-way head, professional video head, aluminum 501HDV with pan bar. Includes box, instruction manual, and warranty. This head's tripod mounting base is a 75mm half ball (520BALL), 16cm long, which was used to connect to the head. It's a half ball for integrating flat-base heads onto video tripods, allowing for quick setup. It's widely compatible with video cameras and DSLR cameras with super-telephoto lenses. The level is convenient for leveling, and the combination of this head and a level is ideal for super-telephoto lenses. I used it for overseas expedition photography. It has not been used domestically. The number of uses (during expeditions) is about 10 times, and it is a relatively clean item. The product is fully functional. Everything in the images is included. Main Features: Pan bar can be attached to either the left or right side. Alcohol level for accurate leveling. Counterbalance system with a load capacity of approximately 2.5kg. Specifications: 501HDV HEAD: Height 11.5cm, Weight 1.6kg, Maximum load 6kg, Quick release, Aluminum Tripod mounting head attachment: 75mm half ball (520BAL), length 16cm, connected to the head with a 3/8 inch male screw. Pan bar: Length 365mm Base plate: With large and small screws Outer box, 3 instruction manuals, warranty