Architectural Door Closers. The 8500 Series is a Multi-Sized Door Closer Adjustable through the power range of sizes 1 through 6. Closers come with screws, brackets & soffit plate to allow for regular, top jamb, & parallel arm installations. Visit now: https://www.parkavenuelocks.com/shop-by-brand/norton/norton-8501-8501h-multi-sized-door-closer.html