1.good quality 2.fine workmanship 3.Through the authentication 4.Manufacturers, large scale, low price TECHNICAL SPECIFICATIONSTemp.range -40~+60°CVibration 100m/s2 10~500GHzImpedance 75ΩFrequency Range DC~1GHzWorking Voltage 170V maxWithstand Voltage 200V rmsContact resistance Center Contact ≤10 mΩ Outer Contact ≤5 mΩInsulation resistance ≥1000 MΩVSWR Straight ≤1.2Durability(mating) ≥500 ...