Finsbury Medium Heavy Duty Door Closer - Grade 1 Commercial, Adjustable Spring Size 1-6, ADA & UL 3-Hour Fire Rated, Hydraulic Auto Close, Surface Mount for Interior/Exterior Doors (Black). 13"L x 3"W x 2.5H. Commercial buildings, fire-rated doors, high-traffic areas. Commercial Door Closer, Instruction Sheet, Life Size Templates, Mounting Screws, Parallel Arm Bracket. Grade 1 Certified for Medium to Heavy Use: This closer is BHMA/ANSI Grade 1 rated and tested to over 2 million cycles, making it ideal for high-traffic doors in offices, schools, clinics, and commercial ...