Polyaxial pedicle screw 6.5 mm diameter (TAV) top loading Low-torque locking mechanism with non thre , Polyaxial pedicle screw (Titanium) 4.0 mm diameter comaptible with 5.4 mm connecting rod and locking , 6 mm dual core and dual lead thread polyaxial screw, streamlined tip. Head diameter 15x13x12. , 45 mm Total Quantity : 432