gutta percha 02 taper with 20 gutta percha 02 taper 25 gutta percha 02 taper 30 gutta percha 02 taper 15 gutta percha 02 taper 35 gutta percha 02 taper 40 gutta percha 02 taper 45 gutta percha 02 taper 50 gutta percha 02 taper 55 gutta percha 02 taper 60