Descriptions Note: The 44mm head is more small and unsuitable for heavy telephoto lenses.Probably one should go for the 55mm head when you work with heavy tele lenses. 【High Bearing Capacity】The KB44/KB55 uses a 44mm/55mm super-large sphere, the ultimate diameter of the ball gives it ultimate weight capacity and stability，Max Load 30kg/40kg.The master lock knob features stainless steel ball bearings for a lifetime of silky-smooth control and powerful locking. 【Drag/Friction Knob Design】Drag/Friction knob for better control of the tension.Enjoy control and consistency with the micrometer drag tension adjustment, guaranteeing repeatable and reliable performance in every shooting scenario.Precise motion control for accurate composition. 【Dual Drop-notches Design】The KB55 offers up to 45-degrees of tilt in all directions, and up to 90-degrees in the two drop-notches. Dual drop-notches allow maximum flexibility for positioning the camera for portrait-orientation or extreme angle shots. 【High-quality Materials and Superb Craftsmanship】The tripod ball head was made of high strength aluminum alloy, advanced CNC manufacturing process and surface anodizing treatment technology, CNC machined components for exacting precision and dependability. It is very strong and durable. 【Wide Range of Applications】Removable quick-release plate, comes with 1/4” screw and safety lock, suitable for most DSLR cameras, camcorders,telescopes; the bottom screw hole is 3/8”, can be widely applied to various professional tripods, monopod, slider and other stands. Specification of KB44 Brand:ARTCISE Model:KB44 Max load:55.1lb/25kg Net weight:1.0lb/0.47kg Material:aluminum alloy Mounting screw:1/4" Bottom screw hole:3/8" Ball diameter:1.7in/44mm Bottom diameter:2.4in/61mm Hight:3.4in/87mm Specification of KB55 Brand:ARTCISE Model:KB55 Max load:66.1lb/30kg Net weight:1.3lb/0.59kg Material:aluminum alloy Mounting screw:1/4" Bottom screw hole:3/8" Ball diameter:2.8in/70mm Bottom diameter:2.2in/55mm Hight:3.7in/95mm Product List 1. Ball Head*1 2.Ball Head Bag*1 3.Extra Quick Release Plate*2

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