1Pcs 45# Steel 05B Sprocket Wheel 10 Tooth - 28 Tooth Industrial Motor Chain Gear Drive Process Bore Transmission Parts Name: Sprocket WheelMaterial: #45 steelModel:05BTooth: 10 Teeth - 28 TeethBore:Process BorePitch:8mmUnit:mmSizeDdT05B 10 Teeth29161505B 11Teeth31.5181505B 12 Teeth34211505B 13Teeth36.5241505B 15Teeth41.5281505B 16Teeth44301505B 17Teeth46.5341505B 18Teeth49341505B 19Teeth51.5351505B 20 Teeth54401505B 21Teeth56.5441505B 22Teeth59351505B 23Teeth61.5351505B 24Teeth64351505B 25Teeth66.5401505B 26Teeth69401505B 28Teeth744015