LCN - 4021 - Hydraulic Door Closer - Regular Arm - Left Hand - Plastic Cover - Aluminum - Fire Rated - Grade 1 RCI It also incorporates a Similarity

It also incorporates a Similarity Threshold

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LCN - 4021 - Hydraulic Door Closer - Regular Arm - Left Hand - Plastic Cover - Aluminum - Fire Rated - Grade 1 RCI It also incorporates a SimilarityThe 4020 Series are heavy duty closers that meet demands for high traffic installations and each are designed specifically for unique mounting applications. They are UL and cUL listed, meet ANSI BHMA Grade 1 standards and boast 30 year warranties. They feature a standard plastic cover, with optional plated finishes for the cover, arm and fasteners. They also feature the LCN Green Dial spring force indicator, which takes the guesswork out of