So this UPANBIKE mountain bike stem is a straightforward upgrade for your bike - it's 50mm long (measured as center distance between the two holes) with a 40mm height, made from lightweight aluminum alloy that's both strong and durable. The stem clamp diameter is 28.6mm (which is the standard 1-1/8 inch size), and it accommodates handlebars with either 31.8mm or 35mm diameters, giving you flexibility for different setups. The green color adds a nice pop of personality to your bike's appearance if that's your style. Weighing only 190g, it's lightweight enough not to add unnecessary bulk to your ride. Installation is pretty straightforward - you just connect it to your front fork stem, and the four-bolt bar clamp holds your handlebar securely in position without slipping. It's compatible with most road bikes, mountain bikes, MTB, BMX, and other similar bicycles, making it a versatile component to have. The aluminum construction provides good strength-to-weight ratio, so it can handle the stresses of mountain biking without failing. Whether you're looking to replace a worn-out stem, adjust your riding position, or just want to refresh your bike's look with some color, this stem delivers reliable performance at an affordable price point. It comes with all the necessary hardware and is ready to install right out of the package.