1 Mod 23T Spur Gear 45# Steel Pinion Gear Thickness 10mm Outer Dia 25mm x 1Pcs: Amazon.com: Industrial & Scientific
Power Transmission 1pcs 12T 0.5M 5mm Width 0.5 Module 1.57mm Pitch Motor Metal Spur Gear 2mm/3mm Hole - (Number of Teeth: 12 Teeth; Hole Diameter: 2mm): Amazon.com: Industrial & Scientific
Amazon.com: Redcat Racing 03004 Plastic Spur Gear 58T, 0.6 Module : Toys & Games
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Power Transmission 1pcs 12T 0.5M 5mm Width 0.5 Module 1.57mm Pitch Motor Metal Spur Gear 2mm/3mm Hole - (Number of Teeth: 12 Teeth; Hole Diameter: 2mm): Amazon.com: Industrial & Scientific