- PLA Filament - NEMA23 Motor (preferably with axle out both sides) - M5 x 30mm - M5 Nuts - 4mm OD quick release tubing connector - 608 Skate bearing - Hobbed pulley (0.5"/12mm OD) (http://www.reprapdiscount.com/mechanics/52-hobbed-pulley.html) - 1/4 OD x 1.25" spring (http://www.mcmaster.com/#9657k106/=sju6jh)