item rate contract for supply and installation of weighing balance and weighing box laboratory instruments and equipments at departmental water quality testing laboratories in uttarakhand , supply and installation of following laboratory instruments / equipments at departmental water quality testing laboratories ( annexure-7 ) as per enclosed specifications mentioned in this tender document. , weighing balance , weighing box , annual maintenance charges for following instruments for five years after lapse of guarantee / warrantee period from the date of installation at destination laboratories in any part of uttarakhand state with all materials, labour, t&p etc. required for maintenance. ( 1 ) weighing balance , for first year , for second year , for third year , for fourth year , for fifth year , ( 2 ) weighing box , for first year , for second year , for third year , for fourth year , for fifth year