NT, EMS, Sea etc12.Delivery Time5-7 working daysHow to use the 15ml bottle gel nail polish?1) Wash hands, wipe nail and remove cuticle2) Brush a thin layer primer gel, waiting for 1 minutes2) Brush a thin layer base coat, curing? 1-2 min by UV lamp3) Brush a thin layer 15ml bottle gel nail polish, curing 1-2 min by uv lamp4) Brush a layer top coat, curing 3 min?5) Wipe nail surface with cleanser to get perfect shiningIf LED Lamp, curing time should be 30-60 seconds per time.How to remove of 15