The hydraulic door closer from KANA is an excellent and reliable option for automatically and smoothly closing doors. It is available in different models and sizes to suit residential and commercial doors. KANA KA-6117L (Large Size): Designed for large and heavy doors (whether wooden or metal) in schools, mosques, and offices. Smart Control: Allows you to adjust the closing speed and hydraulic thrust to prevent the door from slamming. Durability: A durable, corrosion- and rust-resistant body suitable for indoor and outdoor use. Available Colors: Silver.