Check the listing for details. Planetary Plastic Gear 2.75 Speed Increase DIY Robotics Project Build. Condition: Used. Listed at 0.99 USD. This gear is removed from a used Brother printers. It will likely have grease and toner on it. It is in good working condition. Slow gear is 1.317" in diameterCenter gear is 1.476"Fast gear is 1.272"JL Missouri Parts has been selling on Ebay for well over a decade. We are constantly expanding the line of parts we offer. We are a small family run business NOTICE: We ship every weekday, expect a business day before your item is shipped. Everything is shipped with Tracking. If you have a problem with your purchase please contact us and we will do our best to resolve it. I use calculated shipping, so if you are interested in multiple items I am selling add them to your cart and the shipping will be combined by Ebay’s system. International Buyers: Due to the high cost of shipping, I cannot accept returns. Please be sure you know what you are buying. Understand that I cannot control shipping after it leaves my possession, and it can take months to get to you.#64 R12-21