Put oak_log in the filter to only allow oak logs.
Use *wood to allow any item with "wood" in its name. Advanced: Use *wood,stone to filter multiple item types. HopperFilter
Tired of building massive, 1-wide tileable redstone contraptions just to sort your cobble from your dirt? is the lightweight Spigot plugin that brings advanced, GUI-based item filtering to your Minecraft server. Put oak_log in the filter to only allow oak logs
to enhance your server’s survival experience! yml settings? Minecraft Hopper filter - EarthMC the filter is removed".
Name a hopper in an anvil to instantly apply filters.
"If you write 'null' in the renamed hopper, the filter is removed".