1,material:brass, other material also acceptable 2,size :knob:32mm,base:16mm, or other size 3,Finish: PB,CP,GP,SN,SC and so on 1,material:brass, other material also acceptable2,size :knob:32mm,base:16mm, or other size3,Finish: PB,CP,GP,SN,SC and so on door bumper with rubber