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Lens
Lenses and Filters are pipe plugs used to paint and filter any item that travels through it.
Place a lens on the connecting face between two item transport pipes and it will paint it that color. The Clear Lens will wash the paint off any item that travels through it. Painted items are not permanently altered; the paint is only used for the duration of its travel throughout the pipe system.
Place a filter on the connecting face between two item transport pipes and it will only allow items that are painted the same color as itself through. The Clear Filter will only allow unpainted items.
If you wish for a gate controllable version of this system, these pipes can achieve the same functionality as lenses and filters when used in conjunction: Emzuli Transport Pipe Lazuli Transport Pipe Daizuli Transport Pipe