Retreatment Potaper system, False is
It has a cutting tip unlike routine protaper system.
Has a non cutting tip
D1 with 0.30 mm diameter and 9% taper is used for coronal third
D2 with 0.25 diameter and 8% taper is used upto middle third
D3 with 0.20 diameter and 7% taper is used for apical third