Mini pen insert to convert 5.6 mm pencil kits into pens.
The insert holds a standard mini pen refill so the insert can be refilled indefinitely and with optional mini refill colors. Use the insert by simply popping out the lead of your 5.6mm sketch pencil and popping in this insert. Each insert includes a black ink mini pen refill. The refill easily unscrews from the insert for replacement.
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