Adjustable Aluminium Door Closer for Fire-Proof Door&CE&UL (501)

(1)Dual Valve, Closting And Latching Speed Controlled By Two Separate Requlating Valves. (2)Universal Applicatin: Standard, Top-Jamb, Parallel Arm Installations. (3)Standard Packing no include Parallel Arm Bracket. The bracket be provided upon request. (4)Reionforced Type Adjustable Tube Arm. (5)Rack and Pinion Operation Contained in a High Tensile Precision Cast aluminum Housing For The Highest Quality. (6)High Quality Hydraulic Fluid for High Lubricity and Constant lubrication. (7)Optional Back Check (503BC, 504BC, 505BC), Controlled by Separate Regulating Value. (8)Finish Selection: Silver(Alum), Bronze(Duro), Gold. Any Other Finishes Is available Upon Request. Q: What certificate do you have?A: We have CE, UL, ANSI, UKCA, BHMA and CERTIFIRE certificate, all of our products follow up the international standard.  Q: Do you accept OEM or ODM?A: Yes, we accept OEM and ODM.  Q: Could you send me samples before place an order?A: Sure, we can provide samples for quality checking.  Q: How long is the delivery time?A: 30 days.  Q: How about the payment terms?A: T/T, L/C and D/P.  Q: How about your quality warranty?A: We provide 5 years quality guarantee./* January 22, 2024 19:08:37 */!function(){function s(e,r){var a,o={};try{e&&e.split(",").forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1