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Benro S6PRO and Benro S6N are different names given by the benro factory to the same product, and the two models are shipped randomly.
Key Features
Featuring a 65mm flat base with a 3/8"-16 threaded hole, the Benro S6Pro/S6 Fluid Video Head can efficiently be moved between compatible tripods and sliders, jibs, monopods, and other support gear. It supports up to 13.2 lb loads and offers 5+0 steps of counterbalance and continuous pan and tilt drag. There are also independent pan and tilt locks. The tilt range is a wide +90/-75°, and the pan range is a full 360°.
Some parts of the head are made of magnesium and other parts of
aluminum. Virtually the entire head, including its knobs, is made of
robust yet lightweight metal. A pan bar is included that can be attached
to a rosette adapter on the left or right side of the head, for left-
or right-handed users. A camera plate is included that can be adjusted
forward/backward to let you find the optimal balance for your camera. A
safety lock on the plate ensures that once mounted, the plate won't slip
out if you move it in either direction too much. Two camera screws are
supplied—1/4"-20 and 3/8"-16—that can be stored underneath the camera
plate on the head itself, in dedicated slots. For attaching accessories,
there's a 1/4"-20 threaded hole on each side of the head to which you
can secure articulating arms.