Indoor and Outdoor Heavy-Traffic Door Closer - Automatic Adjustable

Material: Aluminium alloy Suited Door: Stainless Steel Security Door Feature:- Silent mode on off- Automatic hydraulic cushioning door closers- Latching Speed Control/Dual Valve Closing- Precise sealed, preventing oil leakage. Continuous adjustment of closing and latching speed: the fast speed can be adjusted to within 3s from 70 degree, slowness close can reach to 60s or more.-Includes Mounting accessory