Step Spur Gear 3mm Inner Hole Gear 21T Mod 0.5 Aluminum Alloy Motor Gear
$7.99
Size - Teeth: Teeth: 21T, Step Diameter: 9mm / 0.35inch, Step Height: 5mm / 0.2inch, Outer Diameter: 11.3mm / 0.44inch, Inner Hole Diameter: 3mm / 0.12inch, Effective Tooth Length: 5mm / 0.2inch, Total Thickness: 10mm / 0.39inch, Teeth Pitch: 1.5mm /…