The Nail Harmony Size 7 Square Gel Brush is an all black brush with a rhinestone studded body with the Harmony logo to included a rhinestone studded lid to protect against any product curing. Slightly larger than the size 6,it is ideal for application of structure gel but can also be used for the 'dry brushing' stage or application of nail designs. This very beautiful brush is a MUST for nail techs wanting a great image with beautifully branded products.