Y-AXIS V-SLOT EXTRUSION CAP
thingiverse
This is a cap for 40x40mm v-slot aluminium extrusion, work really good on my creality cr20 pro. I guess it will work on many orther printer I'll let you find it -- The belt pass trough the part so you will have to get it out first and pass it trough the hole before to reasemble everything --
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