procurement of pantograph assembly complete etc., pantograph assembly complete for high speed ac locomotives 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 ) . specn: 1 ) pantograph as per clw specn. no. clw / es / p-5 alt.f. 2 ) metallized carbon strips should be of rdso approved makes only viz., m / s. acpl, guwahati ( grade-my7d ) , m / s. mersen india ( carbone lorraine ) / bangalore ( grade-p5696 ) or m / s.schunk metal, bangalore ( grade-bh 424 c1 ) confirming to rdso specn. no. rdso / 2009 / el / spec / 0097 rev.-1 sept. 2013. [ warranty period: 30 months after the date of delivery ]