supply of pantograph assembly complete for high speed ac locos with motor assembly, mechanism assembly, throttle vale 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. note: metallized carbon strips should be of rdso approved makes only viz., m / s. acpl, guwahati ( grade-my7d ) , m / s.mersen india ( carbonelorraine ) / bangalore ( grade-p5696 ) or m / s.schunk metal, bangalore ( grade-bh 424 c1 ) confirming to rdso technical circular no.elrs / tc / 0071 / 2001 ( rev 0 ) or latest.