Manufacturer Norton Door Controls Model 78B/D-PA-LH-689 Size Spring Size 2 thru 4 Mounting Parallel Arm Push Side Hand Left Hand – LH U.L. Listed UL Listed, This includes compliance to UL10C for 3-hour assemblies Compliances These closers are also listed by the New York City Materials and Equipment Acceptance Division ANSI/BHMA ANSI/BHMA A156.4 Grade 3 Warranty Limited ten-year warranty for defects and life of the building on the aluminum housing Weight 12.0000