Specification:Name: 45 Degree Helical GearDirection: Left Hand / Right Hand Material: 45# SteelSurface Treatment: BlackeningTooth Surface Treatment: High Frequency Quenching and HardeningModel: 1 Module (1M)Teeth: 12 13 14 15 sixteen 18 20 TeethTooth Height: 12mmTotal Height: 20mmD Hole:5x4.5mm6x5.5mm8x7mm8x7.5mm10x9mmShaft Hole: Machining completedNote:1. The tools materials is made of 45# steel, there may be rust stains in case of water, which is usual and does not impression typical use.2.This hyperlink gears are unmarried price, please choose to purchase consistent with their actual desires of the variety of options.3.This link is 45 degree helical D-hole helical gears, that are used in parallel (180 degree) or staggered (90 degree) generally machinery.4. The bigger the module, the bigger the teeth shape, the larger the burden capacity. As lengthy because the modulus is the same, the teeth could be paired to variety varied transmission ratios.Package:Packing : Plastic bag / Carton box.Quantity : According for your Choose!