Minecraft wiki entry for analog_16-rng, associated text: The droppers all have one stackable item and one non-stackable item. The numbered hoppers have 2 1⁄2 stacks for power level 8, 1 1⁄4 stacks for power level 4, 1⁄2 stack for power level 2, and 1 64-stackable item for power level 1.