If your John Deere lawn tractor seat isn't staying up properly, these compression springs are probably what you need. Specifically designed to be compatible with John Deere LA120, LA125, LA130, LA135, LA145, and LA150 models (basically most of the popular LA series). The part number GX20486 should match what you're replacing. Each set comes with 2 springs - which is perfect since you typically need both. The dimensions are spot on at 80.8mm length, 35.54mm width, with 4.032mm coil width. Installation is pretty straightforward if you're comfortable with basic tools - just make sure to compare the new springs with your old ones before starting to double-check they're the right fit. Caltric makes solid aftermarket parts that are way more affordable than going through the dealer directly. These springs get a lot of wear and tear from people constantly getting on and off the mower, so replacing them every few years is pretty normal maintenance. Much cheaper than buying a whole new seat assembly! Definitely check your model number against the compatibility list to make sure these are the right ones for your specific mower.