Used and sold at profesional salons! OPI is fantastic in quality and performance, sold at most beauty supply stores to the public although it will cost more than the avarage drug store nail polish it is definatly the best! I have used OPI for over 15 years and carrys the most asume colors for evey ones needs styles and likes! Nicole is sister to OPI also and carrys beautiful from sexy sheek to work melow colors, every penny is worth it! a must buy and try product!! highly recomend anyone who is in need of great lasting color! get yours today and dont worry about the price you’ll love OPI and Nicole...every color under the sun or moon! trust me try it today and let me know what you think! many products sold opi top coats, base coats, ridge fillers...files acrylics, tips, all you will need, do it yourself at home and save money from salon nails... great strong products, I love this iteam, have so many colors to choose from for every event!