Multi-color mixed nail solid model glueName: builder Capacity: 15ml Used for: nail extension step: 1. Plastic and file nails to remove the epidermis. 2. Put a nail shape on the nail. 3. Apply top coat and cure under LED light for 30 seconds or under UV light for 120 seconds. 4. Apply the builder gel on the nail tip in one step, and cure it under LED light for 30 seconds or under UV light for 120 seconds. 5. Spread the builder gel on the entire nail in one step and extend it to the desired