1.Concealed Door closer, 2. Alu-alloy material. 3.support 30-60 KG door. 4.painting color,black,sliver,golden ect ... : up to 1200mm and 3.max door width: to 30-60KG.4.Available for :metal ,steel and wooden door,It can be ... , silver, bronze, white,etc.)6.with or without brake function.(90 degrees positioning) *it is suitable in hotel,apartment,office,shop ...