CND Plexigel Brush-In-A-Bottle Gel Nail Extension System The CND Plexigel System Is Versatile And Convenient Nail Enhancement System in a bottle.Provides Up To 3+ Weeks Of Strength, Length, And Shape. Fill It with Shaper or Builder: Save Cracked Nails With Wearable Patches. Fix It with Builder: Repair Broken Nails. Shape It with Shaper: Plump And Shape Flat Nails. Build It with Builder: Create Customizable Length. Basecoat with Bonder Topcoat with Protector Top Coat