OPI is currently one of the biggest manufacturers of nail products and is world-renowned. They sell in over 103 countries and are constantly expanding. Having access to limited research facilities means they are constantly up to date with formulas making sure that each of their products offers the same high quality as the next. Also, they research into trends and release collections and core shades to fit the trends. The fact that they sell over 55,000,00 bottles of lacquer and treatments each year stands to prove the success and demand of their products. OPI produces high quality and highly pigmented shades they also carry a huge range of colours and are constantly adding more collections and core shades. Also, they create many nail treatments and accessories designed to help improve the condition of your nails. Specially Designed contoured shape to make filing effortless. Cushioned Core allows for faster more precise filing. Gives the nails a clean shiny finish. Removes any scratches from the nails. This nail file is flexible, so it allows you to get to all of your nail.