![Amazon.com: FLY MEN Professional Tools, Helical Gear 1.5 MOD 50 Teeth Inner Hole 15mm Spur and Helical Tooth Small 45# Steel Gear Wheels Machines : Industrial & Scientific Amazon.com: FLY MEN Professional Tools, Helical Gear 1.5 MOD 50 Teeth Inner Hole 15mm Spur and Helical Tooth Small 45# Steel Gear Wheels Machines : Industrial & Scientific](https://m.media-amazon.com/images/I/51nAZ3BZWGS._AC_SX466_.jpg)
Amazon.com: FLY MEN Professional Tools, Helical Gear 1.5 MOD 50 Teeth Inner Hole 15mm Spur and Helical Tooth Small 45# Steel Gear Wheels Machines : Industrial & Scientific
![Boston Gear YD12 Spur Gear, Steel, Inch, 12 Pitch, 0.500 Boston Gear YD12 Spur Gear, Steel, Inch, 12 Pitch, 0.500](https://m.media-amazon.com/images/I/51Te1+WUBoS._SX342_.jpg)
Boston Gear YD12 Spur Gear, Steel, Inch, 12 Pitch, 0.500" Bore, 1.167" OD, 1.000" Face Width, 12 Teeth: Amazon.com: Industrial & Scientific
![Amazon.com: Farm to Factory: A Reinterpretation of the Soviet Industrial Revolution (The Princeton Economic History of the Western World, 29): 9780691144313: Allen, Robert C.: Books Amazon.com: Farm to Factory: A Reinterpretation of the Soviet Industrial Revolution (The Princeton Economic History of the Western World, 29): 9780691144313: Allen, Robert C.: Books](https://images-na.ssl-images-amazon.com/images/I/51eqTPCrGAS._SR600%2C315_PIWhiteStrip%2CBottomLeft%2C0%2C35_PIStarRatingFIVE%2CBottomLeft%2C360%2C-6_SR600%2C315_ZA20%2C445%2C290%2C400%2C400%2CAmazonEmberBold%2C12%2C4%2C0%2C0%2C5_SCLZZZZZZZ_FMpng_BG255%2C255%2C255.jpg)
Amazon.com: Farm to Factory: A Reinterpretation of the Soviet Industrial Revolution (The Princeton Economic History of the Western World, 29): 9780691144313: Allen, Robert C.: Books
![Amazon.com: FLY MEN Professional Tools, 10pcs 0.5M 21/22/23/24/25 Teeth 0.5mod Gear Rack Spur Gear Precision Copper Steel CNC Pinion Machines (Color : 2mm, Size : 23 Teeth) : Industrial & Scientific Amazon.com: FLY MEN Professional Tools, 10pcs 0.5M 21/22/23/24/25 Teeth 0.5mod Gear Rack Spur Gear Precision Copper Steel CNC Pinion Machines (Color : 2mm, Size : 23 Teeth) : Industrial & Scientific](https://m.media-amazon.com/images/I/41kjF1wnxTS._AC_SX466_.jpg)
Amazon.com: FLY MEN Professional Tools, 10pcs 0.5M 21/22/23/24/25 Teeth 0.5mod Gear Rack Spur Gear Precision Copper Steel CNC Pinion Machines (Color : 2mm, Size : 23 Teeth) : Industrial & Scientific
![1.5Mod 20T 45# Steel Motor Spur Pinion Gear Outer Dia 33mm Thickness 15mm x1Pcs: Amazon.com: Industrial & Scientific 1.5Mod 20T 45# Steel Motor Spur Pinion Gear Outer Dia 33mm Thickness 15mm x1Pcs: Amazon.com: Industrial & Scientific](https://m.media-amazon.com/images/I/41UOxfS45+L._SX342_.jpg)