supply of rigid poly screw for posterior anterior spinal system.rigid poly screw for posterior anterior spinal system., srph544576-rigid poly screw for posterior anterior spinal system. used f or thoracolumbar fixation and stabilisation in spine trauma, degenerative and tum or surgeries in both anterior and posterior construct. pedicular screws should have a reverse threaded mechanism and should be compatible with 5.5mm titanium r od. screws should be available in sizes of 4.5, 5.5, 6.5 mm diameter and 25-55mm in lengt h. system should have break off plug mechanism.screw should have an angle of no t more than 28 degree between the head and body. system should be compatible for minimally invasive surgical technique and also be used along with fenestrated or / a nd hydroxyapatite coated screws. system should be registered with drug control ler general of india. system should be iso or bis or fda or ce approved. unit:no