The first cast iron block ever designed allowing a quick connection and disconnection of attachments for skid steer loaders and other construction equipment machines. Cartridges share all the benefits of the FFH series technology. The decompression feature allows to connect the circuit with residual pressure on both ends. Higher flow capability is guaranteed when using 3/4" cartridges instead of 1/2" (both the sizes fit into the same block).
https://www.fastercouplings.com/product-detail/4bd4fh-97
