Arca-Swiss Monoball Z1 sp (Single Pan) Ballhead with 3/8" Screw - Supports 130 lb (59 kg)Overview The Arca Swiss Monoball Z1 sp (Single Pan) Ballhead builds on the success and popularity of their B series ballheads. Z Series ballheads are just as elegant, and even more perfect. The size and weight of the ball heads have been significantly reduced. The ball and fastening are now assembled using a patented bayonet mount. Various accessories can thus be quickly mounted to adapt the tripod as required. In the box Arca Swiss Monoball Z1 sp