EF600 Series Door Closers Futures 1. Material: cast aluminum alloy (or upon customers' requests) 2. Universal application, non- handed, apply for all standard installations. 3. Closing and latching speed controlled by two separate regulating vales 4. Applicable for hotel and household use; Fireproof, anti-theft door 5. Rack and pinion operation contained in a high tensile precision cast aluminum housing 6. Anti-freeze hydraulic fluid for high lubricity and constant lubrication 7. BC Function (Optional). 8. Available colors: silver (alum), gold or other colors upon requests