Description Joby JB01552 Overview The QR Plate 3K from Joby can be used as a spare or replacement plate for the 3K and SLR-Zoom ball head and the GorillaPod 3K and SLR-Zoom tripod kits. The plate has a built-in bubble level to balance your camera. Compatibility Ball Heads JB01513 Ball Head 3K JB00131 Ball Head for GorillaPod SLR-Zoom Kits JB01507 GorillaPod 3K Kit JB00134 GorillaPod SLR-Zoom Kit