N&C Slimline Overhead door closer - Stainless Steel Cover Plate and arm. Meets BS 8300 Document M for use on Accessible doors. Suitable for both internal and external doors between 750mm - 1250mm or 20-100kg Max weight. Dual handed for either push or pull operation. 120 minute fire rating. Power size 2-5. 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. Delayed Action to allow slow moving pedestrians to pass through unhindered by the closing door. Closing and latch speed adjustments. 10 year guarantee. Medium duty fire rated door closer.