Prusa i4 filament holder

thingiverse

A versatile filament coil holder designed to fit snugly into a 20x20mm profile, its sturdy build ensures secure mounting every time. With an inner diameter of precisely 8mm, this spindle is perfectly proportioned to cradle delicate coils with ease. For added stability, the supports boast tiny latches at their base, while thoughtful design allows for optional holes accommodating 4mm screws when extra support is desired.