1.It is easy to update , replaced and maintain. 2.Low cost but good quality. 3.We are high-tech electronic special manufactur. Specification:1.poles:15,16,18,23.2.Voltage rating:AC.DC,50V(50Hz)3.Current rating:0.5A,AC,DC.4.Withstand voltage:500VAC,minute.5.Working Temperature:-25°C-+85 °C6.Insulation resistance:>=800MΩ7.Contact resistance:<=20M Ω8.Dual contact.9.Material:Contact:Phosphor Bronze ...