4800 Conceal Door Closer 1.Suitable for timber door with 35mm-thickness or metal door with min.31mm-thickness 2.Complying with EN1154 ,Durability test to 500,000cycle 3.Extrused aluminum body,harden Anodized treatment 4.Body Dimension:L340mmX W32mm XH45mm 5.Fixed Closoing Strength:EN2-4 6.Max.Opening Angle:180 degree 7.Operation Temperature:-45 to 80 8.Finishedï¼?silver,Gold,etc.