'The Hybrid' is our latest model. It has a large indicator mat to help with dispersal of material, and gravels can be shoveled or pumped straight into this sluice easily. Beneath the mat you have several of the deeper, wider troughs from the original, as well as the shallower, narrower troughs from the propsector. This sluice box is longer than the other models, and is a great evolution of the DR Sluice drop riffle, combining the best features of both previous models.