1)Material:iron 2)Size:100*75*2.5 3)Finis:SN,PB,CP,SB,AB,AC,etc ... million time 1)Material: High quality iron SPCC;2)Size:100*75*2.5mm;3)Hinge with flat or crown head;4)Fixed or ... after 0.1 million times.10)Hinge bearing weights : Thickness 2.5mm: 30 to 40kg ,3.0mm: 50 to 60kg ,3 ... automatic way. it is about 450,000 pairs per month. Flat iron door hinges suitable for wooden and shower door