procurement of medical stores , drugs , disposable perforator for craniotomy size 14 mm ( adult ) , surgicel size 1x2 fibrillar ( oxidised regenerated cellulose with hemostatic effect ) , bone wax box of 12 , artificial suturless dural substitutes 3x3 inch ( codman ) , artificial suturless dural substitutes 4x5 inch ( codman ) , titanium fenestrated aneurysm clip permanent straight 9mm ( sterile pre-packed ) , titanium fenestrated aneurysm clip permanent straight 7mm ( sterile pre-packed ) , titanium fenestrated aneurysm clip permanent straight 11mm ( sterile pre-packed ) , titanium standard aneurysm clip permanent slightly curved 7mm ( sterile pre-packed ) , titanium standard aneurysm clip permanent 9mm straight ( sterile pre-packed ) , titanium standard aneurysm clip permanent 9mm slightly curved ( sterile pre packed ) , percutaneous pedicle screw with top nut ( size 4 . 5x30 ) , percutaneous pedicle screw with top nut ( size 4 . 5x35 ) , percutaneous pedicle screw with top nut ( size 4 . 5x40 ) , percutaneous pedicle screw with top nut ( size 5 . 5x40 ) , percutaneous pedicle screw with top nut ( size 5 . 5x45 ) , percutaneous pedicle screw with top nut ( size 5 . 5x50 )