If your Proform 765 EKG treadmill is showing signs of wear or slipping, this replacement belt is exactly what you need! Specifically designed for model 291771, this 2-ply walking belt is built to handle both home and commercial use. Don't worry about those scare stories about 2-ply belts damaging your treadmill - with over 50 years of combined fitness repair experience behind this product, it's guaranteed safe and effective. The belt comes pre-lubricated to get you up and running quickly, and they even include extra lube for future maintenance. Installation is straightforward if you're handy, though you might want to watch a tutorial video first. The lifetime warranty gives you peace of mind that this is a quality product that'll last. All the necessary fasteners are included in the package. If your current belt is cracked, stretched out, or just not tracking properly anymore, replacing it can make your treadmill feel like new again without the cost of a new machine. Much cheaper than professional service calls, and a great way to extend the life of your fitness equipment. Just make sure your treadmill is unplugged before starting the replacement process!