M4 slide nut  tnut for 3030 extrusion profiles Prusa MK3MK3s
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M4 slide nut / t-nut for 3030 extrusion profiles (Prusa MK3/MK3s)

This slide nut or tnut fits perfectly into the Prusa MK3MK3s extrusion profiles Or any standard 3030 profile ...

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M4 slide nut / t-nut for 3030 extrusion profiles (Prusa MK3/MK3s) alternatives