... size : 60mm , 70mm ,80mm 2. finish : PB ,SN ,CP ,NP 3. type : knob cylinder 4. brass cylinder , single cylinder ... Pins : 5 pins , 6 pins , 7 pins 3.--- Key type : Brass computer keys or brass normal keys ... Surface treatment : Nickel plated , NB , AB , AC , SN , and so on 7. ---Packing : white box, color box ... half cylinder Finished PB, AB, AC, CP, SN, NBKey TypeS normal key, computer key Material brass ...