Hey DIYers and repair folks, this set of gas springs is exactly what you need for various lifting and support applications! Each prop has a 12-inch extended length (measured center to center of the ball sockets) and compresses down to 8.5 inches. The 30-pound pressure rating per spring provides substantial lifting force while still being manageable to install. The 10mm nylon ball socket ends make installation straightforward and secure on compatible mounting points. You get two springs in the set, which is perfect for balanced applications like hatchbacks, lids, or doors that need support on both sides. These are commonly used for automotive applications (hatchbacks, hoods), furniture (lifting lids), industrial equipment, or any situation where you need controlled lifting assistance. The gas spring technology provides smooth, consistent operation without the jerky movement you sometimes get with mechanical springs. If you're replacing worn-out gas struts on your car hatch or furniture, having the right pressure rating and length is crucial for proper operation. Seriously, if you've got something that should stay open but keeps falling shut, these gas springs can restore proper function and make your life so much easier. They're one of those components that seem simple but make a huge difference in daily usability!