Supply Installation And Retro-Fitment Of Usb Mobile Charging Socket As Per Rcf Spcificatio N No Edts- 455, Am-1, Corr-1 Or Latest And Drawing No. Sked 959, Alt-B Or Latest In Lhb Coaches (Removal O F Existing 3-Pin Sockets And Re-Connection Of Usb Charging Sockets & Recommended Testing). (Warranty Period: Up To 30 Months From The Date Of Delivery.) [ Warranty Period: 30 Months After The Date Of Delivery ] ]