OPI Nail Treatments Sale! OPI Nail Envy – Nail Strengthener – Original 15ml £20.99 £18.99 Sale! OPI Infinite Shine Base Coat Primer 15ml £15.95 £12.99 Sale! OPI BondAid Balancing Agent 30ml £14.99 £9.99 Sale! OPI Swiss Blue Liquid Hand Soap 460ml £16.30 £11.99 Sale! OPI Nas 99 Nail Cleaning Solution 450ml £49.99 £39.99