Not to be confused with the Walls category.
This is a category page about conveyors with walls attached to them. Walls prevent ores from falling off the conveyor but ore can only come in from one side instead of three without a Conveyor Ramp.
Note: Please stop making useless pages just for 1 detail that's repetitive. It's just like making a category page for items that have wafers in them, and are not a help to the wiki.