pellet stove pipe blockage

nothing special, just a simple blockage for a pellet stove's pipe, since i couldn't find it anywhere in shops near me, i 3d printed it.
in my case it fit perfectly into the built in gasket. The external diameter of the tube is 80 mm while the cap itself it should be something like 88mm or so ( i don't remember because i made a surface offset and then i smoothed all the edges) and the lenght is 42 mm.
i made a smaller circle in the middle of the cap just to incorporate the initial design of the external cap.
DO NOT use it with a working stove, it's just for an aesthetic purpose.