Commercial Door Closer Grade 1 Hydraulic Extra Heavy Duty Self-Closing Adjustable Size 1-6 ADA Compliant ANSI/BHMA Certified UL Fire-Rated (MN9001 - Heavy Duty Door Closer). MN9001 - Heavy Duty Door Closer. 13"L x 3"W x 3H. Heavy Duty Hydraulic Performance - Commercial-grade door closer with adjustable spring size 1-6 for door weights from 40 to 330 lbs; ideal for high-traffic applications including storefronts, schools, offices, hospitals, restaurants, and warehouses. Full Closing Control - Independent valves for sweep speed, latch speed, and backcheck allow smooth, precise ...