Novoflex QuadroPod Monopod Plate 
The Novoflex QuadroPod Monopod Plate can be used to convert any of the QuadroPod modular tripod legs (other than the mini legs) into a lightweight monopod camera support. All tripod legs are available separately. The QuadroPod system uses four legs rather than three for camera support, and consists of carbon fiber or aluminum legs and a base (3 versions available separately) which assemble quickly into a 4-legged camera support with increased stability.
    Converts any QuadroPod leg into a monopod camera support