Rollers for Printrbot Metal Plus Filament Spool Holder
Description
This Is An Upgrade For My Printrbot Metal Plus Spool Holder (Http://Www.Thingiverse.Com/Thing:675439) The Narrow Roller Bearings Tend To Lean Over, And Occasionally The Spools Become Dislodged. These Rollers Overcome Those Shortcomings And Are Much Easier To Load.
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