supply of pantograph assembly complete for high speed ac locos with motor assembly, mechanism assembly, throttle valve assembly and fitted with metalized carbon strips as per rdso drg. no. skel-4303 ( rev-6 ) . ( without panto mounting insulators ) as per clw specification no. clw / es / p-5, alt.f. metalized carbon strips should be of rdso approved makes only. viz., m / s acpl, guwahati ( grade-my7d ) , m / s mersen india ( carbone larraine ) / bangalore ( grade-p5696 ) or m / s schunk metal, bangalore ( grade-bh 424 c1 ) confirming to rdso technical circular no. elrs / tc / 0071 / 2001 ( rev %u20180%u2019 ) or latest. [ warranty period: 30 months after the date of delivery ]