Name: Industrial SprocketModel: 08BMaterial: 45# SteelSurface Treatment: Hardening of teeth surfacesTeeth Pitch: 1/2'' (12.7mm)Teeth: 10 Teeth ~ 25 TeethBore: Process HoleShaft Hole: Machining accomplished (Standard hole)Note:1.The middle is the method hole, desire prospects to buy back their own processing to expand.2.The length of the method holes may possibly fluctuate from batch to batch. If you have standards for the size of the method hole, please seek the advice of customer service for the actual size.3.Due to various production batches, the diameter of the stairs may differ slightly. Please refer to the actual product for accuracy!