supply of ( sr ph code 544579 ) poly axial pedicle screw for single lock spinal system - used for lumbosacral fixation and stabilisation in spine trauma, degenerative .pedicular screws should have dual threaded mechanism and should be compatible with 5.5mm titanium / cobalt chromium rod . screws should be made up of cobalt chromium and available in sizes of 4.5 , 5.5 , 6.5 mm diameter and 25-55mm in length . system should have break off plug mechanism. screw should have an angle of not more than 28 degree between the head and body. system should be compatible minimally invasive surgical technique and also be used along with fenestrated or / and hydroxyapatite coated screws . screws should be colour coded for easy identification. system should be registered with drug controller general of india. system should be iso or bis or fda or ce approved. unit:no