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Package list: 2 pieces right helical gear 2 m 20 teth Material: 45# steel Tooth surface treatment: high frequency extinguisher Power Angle: 90 Degree Note: There are errors in manual measurement, the size is only for reference.; Product description Package list: 2 pieces right helical gear 2 m 20 teth. Material: 45 # steel. Tooth surface treatment: high frequency extinguishing Net angle: 90 degrees. Note: Due to manual measurement, there are errors, the size is for reference only.; Product description Package list: 2 pieces right helical gear 2 m 20 teth. Material: 45 # steel. Tooth surface treatment: high frequency extinguishing Net angle: 90 degrees. Note: Due to manual measurement, there are errors, the size is for reference only.; Package list: 2 pieces right helical gear 2 m 20 teth. Material: 45 # steel. Tooth surface treatment: high frequency extinguishing Net angle: 90 degrees. Note: Due to manual measurement, there are errors, the size is for reference only.