Looking to upgrade your 3D printer and get rid of that wobbly bed? This MroMax die spring might be just what you need. It's a medium-load compression spring with a 20mm outer diameter (OD), a 10mm inner diameter, and a total length of 300mm. Die springs are way stiffer and more durable than the standard springs that come with many printers, like the Creality Ender series. By swapping them in, you can get much more stable and consistent bed leveling, which means better first layers and fewer failed prints. The red color indicates it's a medium load rating (just FYI, yellow is also medium, but this one's red). It's made for high-stress industrial applications, so it can definitely handle the pressure in your printer setup. Super easy to install – just replace your old bed springs with this one. Whether you're a tinkerer or just want a more reliable printing experience, this single spring is a simple, affordable upgrade. One piece per order. Go on, give your printer the solid foundation it deserves!