Providing and Fixing in position Buried Cable Route Markers made up with Precast Cement Concretee block,CC 1:2:4 using 20 mm downgraded aggregates ,height 450 mm,bottom size 200X150 mm and top size 100X150 mm(Frustum of a pyramid) ,smooth finish all round with one coat of primer and two coats of synthetic enamel paint of approved make & colour including necessary markings and holes as per drawing,formwork,curing etc complete all as directed by Engineer-in charge.The markers shall be placed at about 10 m c/c as per site conditions along the alignment/route of cables.