Per 
Item #: SCP-4478
Object Class: Safe
Special Containment Procedures: [Paragraphs explaining the procedures]
Description: SCP-4478 is a box filled with standard-issue filters for the Foundation's current respirators models. It holds exactly 7 at a time slated against each other inside the box. If left unused for a week, it will begin to reconstruct itself from unknown sources in unknown locations. Each filter is to be classified as SCP-4478-1 through SCP-4478-7. Each version of SCP-4478 has various effects when a living being was to inhale any variants of SCP-4478 through a respirator.
SCP-4478-2 ash
SCP-4478-3 WEED
SCP-4478-4 air poison
SCP-4478-5 mutates you slightly
SCP-4478-6 nanobots that overstimulate you till you off yourself
SCP-4478-7 tastes like something and gives nourishment
Addendum: [Optional additional paragraphs]
