triennial comprehensive maintenance and servicing of silent dg sets ( perkins make ) of different capacities installed at sub station - ii, iii & iv of sskm hospital and s.n.p. hospital of ipgme&r - sskm hospital, kolkata - supply & delivery of urgent materials. , supply & delivery of lub oil filter ( for 750 kva ) , supply & delivery of fuel filter ( for 750 kva ) , supply & delivery of fuel filter ( for 750 kva ) , supply & delivery of lubricating oil-15w40 ci4 for perkins engine ( for 750 kva ) , supply & delivery of premix coolant inhabitor for top up ( for 750 kva ) , supply & delivery of lub oil filter ( for 1010 kva ) , supply & delivery of fuel filter ( for 1010 kva ) , supply & delivery of lubricating oil-15w40 ci4 for perkins engine ( for 1010 kva ) , supply & delivery of premix coolant inhabitor for top up ( for 1010 kva ) , supply & delivery of fuel filter primary ( for 625 kva ) , supply & delivery of fuel filter secondary ( for 625 kva ) , supply & delivery of lub oil filter ( for 625 kva ) , supply & delivery of lubricating oil-15w40 ci4 for perkins engine ( for 625 kva ) , supply & delivery of premix coolant inhabitor for top up ( for 625 kva ) , supply & delivery of battery 12v 180ah exide make , make & model of each and every material to be approved by eic