If you are in need those hard to find Guardian Repair parts; such as Safety Sensors for your Pro Series 628 Model, you have come to the right place. We carry all of the repair parts for your Guardian Opener to get it back to the standard Powerful operating condition. Guardian gear replacements, Belt Pulley , Rail Assembly , Replacement Belt , Chains, Trolley , Logic Circuit boards , and Position encoders can all be found at North Shore! Take a look at the categories below; if you do not find what you are looking for; give are trained tech support a call @ 800-783-6112! We can help properly identify your problem and fit you with the correct repair parts or accessories.