Check the listing for details. Improved Nylon replace gear Hunt Boston model 17 electric pencil sharpener 296A. Condition: New. Listed at 8.88 USD. Hunt Boston Electric Pencil Sharpener Model 17 replacement Nylon helical gear It is FDM made Nylon improved design gear has a 20% wider face (6mm) for better durability and reliable performance.Gear face is 20% wider compare to OEM and other replacements.It is made out of Nylon - tough and flexible plastic.Nylon is naturally slippery - no lubrication on gear teeth required.Only Nylons should be used for gears where a slippery surface is desired. All other materials (PLA, ABS, PET-G, etc.) will grind each other to dust and eventually fail. Do not waste money for ABS, PLA plastic gear that may strip or melt For details and to compare, please review all pictures.Please lubricate the cutter shaft. Gear specificationsTooth count 58 Diameter: 44.4mm (1-3/4") Hub width 8.2mm (1/3")It fits cutting assembly shaft snugly, no clip required! Also fit Panasonic KP-22A sharpener This gear purposely made 20% thicker so it won't break like original did. It fit snugly and won't slip of the shaft thanks to a 15 degree helical angle. Ruining motor pushes gear on to the shaft. Gear designed to be installed without the clip. Manufacturer omitted holding clip on later models.Thanks for reading.