supply of various building materials i . e . stone metal , stone aggregates , sands etc . in all villages of block narnaund distt hisar group1 , supply of various building materials tentative qty will be as per annexure c , stone metal 63-45mm gauge as per pwd specification ( 1988 ) 3 . 64 , stone metal 53-22 . 4mm gauge as per pwd specification ( 1988 ) 3 . 64 , vapsi - 40mm gauge as per pwd specification ( 1988 ) 3 . 29 blue , stone aggregate ( bajri ) 20mm nominal size as per pwd specification ( 1988 ) 3 . 29 , stone dust ( crasher blue ) as per pwd specification ( 1988 ) 3 . 30 , jamna sand as per pwd specification ( 1988 ) 3 . 60confirming to pwd specification 3 . 11 , supply of screening as per pwd specification ( 1988 ) 3 . 60 , local sand