In 2006, ARCA succeeded in improving the monoball even further by introducing the Z series to replace the now legendary B series. 

The new model is not only lighter (currently weighing 660g), but also more stable. On average, it can carry up to 60 kg and, thanks to the use of more advanced manufacturing technologies, it is now possible to offer the new Z series at an even more reasonable price.

sp (=single panorama) means that there is a pan swivel unit at the base of the ball head, meaning that ARCA-SWISS Monoball can be rotated 360 degrees.

ARCA-SWISS Monoball Z1 sp with 1/4&quot threaded disk is the most economically-priced of all ARCA ball heads. I would always advise you also to purchase a quick-locking device so that you can operate the camera even more easily and faster.

P.S. Most KB cameras are equipped with a 1/4&quot threaded disk.