Hot Racing 13 Tooth .5 Mod Pinion Gear FEATURES : Steel construction with blackened finish for high strength and durability YOU WILL RECEIVE : 13 Tooth .5 Mod Pinion Gear 3mm Set Screw SPECIFICATIONS : Number of Teeth: 13 Hole diameter: 1/8 inch (3.2mm) Gear Pitch: .5 Mod length: 0.35 inch (8.9mm) Tooth Face width: 0.20 inch (5mm) Hub Outer diameter: 0.32 inch (8mm) SN February 13, 2015