ITEM NAME:Pro Nail Art Brush Tool For Acrylic & Metal Handle With Diamond Kolinsky Hair 8#.1 x Nail Art Brush. Ideal for Gel Nail. Nail Art Brushes' Maintenance General Knowledge Brush Size: #8. Shaping the brushes hair into an ideal form, put it flat on the shade and air drying. Don't dry it with blow dryer, avoid pulling and cutting brushes hair.