This is a complete bean hopper assembly for Compak grinders. Included is the top cover, finger guard, and trap door. It fits the K3 Touch, K3 Elite, K10 WBC and all of the Essential On Demand grinders (E6, E8, E10). This is the shortest hopper available for Compak grinders. This hopper is roughly 4 1/2 inches tall from the base of the neck to the top (not including lid).