N&C Slimline Overhead door closer - Stainless Steel Cover plate and arm. Suitable for both internal and external doors between 850mm - 1400mm or 40-120kg Max weight. Dual handed for either push or pull operation. 120 minute fire rating. Power size 2-6. Adjustable power by spring, meaning the closer can remain fitted whilst adjustments are made. Back check function to prevent door from being "over-extended" and causing damage to person or property. Closing and latch speed adjustments. 10 year guarantee. Heavy duty fire rated door closer.