Diet Hoppers Mod 1.12.2, 1.11.2 modifies the way Minecraft calculates the collision boxes of the hopper, so that you can access any visible blocks behind it. This mod needs to be on both client and server to prevent desync issues.
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Requires:
How to install:
Diet Hoppers Mod 1.12.2, 1.11.2 Download Links:
For Minecraft 1.12.2, 1.12.1, 1.12, 1.11.2, 1.10.2