Black caps, 12 pieces, no box

I intended to buy the black cap in gray, but I ended up purchasing the normal black cap, so I am listing it for sale.
The box is not included, but the item is unopened.

1-year effectiveness, 12 pieces included

Will be shipped in a plastic bag inside a brown envelope.

?Price is firm
?Even if we are in the middle of a conversation, the first person to purchase will be prioritized.