Hi, dear sir/madam,It is nice to write to you. This is carlos from Romania. I am interested in placing your Vibration Sensor Door Knob Alarm Door Security on the market.Could you please send me the quotation from this with the details as below:Metal Type,Metal Ceiling Material,Color,Do you have any quality assurance certificates?I hope we can cooperate in the near future.Best Regardscarloslki Show More