1)ISO 9001:2000 certificate ,IEC standard 2)Best in quality ,Supply on time ,best service,professional design ... switching.Attention:1). ISO 9001:2000 certificate .per IEC standard 2). excellent quality .on-time delivery, best service .professional design 3 ... brass. With nickel or Cu Sn Zn plated N /L29-JK Coaxial Adapter