Brand: Norton Rixson. MPN: 1621-4008. Model: Norton Rixson 1621-4008. Type: Door Closer. Suitable For: Commercial. Material: Aluminum. Finish: Matte. Color: Silver. Features: Adjustable closing speed, adjustable latch, self closing, surface-mounted, heavy duty. Mounting: Surface-mounted configuration with visible mounting holes on endcaps; adjustment ports accessible on body. Body markings: Norton Rixson and ASSA ABLOY logos stamped on housing; model number (1621-4008) cast on body. Listing includes: Door closer body only as shown; no arm, bracket, screws, or additional hardware included.