Get the best of both worlds with the OPI Duo Nail Polish & GelColor Gel Nail . OPI nail polishes are designed to last for at least two weeks after application. OPI shine-intense GelColor gel nail polishes cure in 30 seconds and last for 3 weeks. OPI's long-lasting GelColor polishes are easy to apply and easy to soak-off. From eye-popping bright polishes to treatments that transform nails, it's no wonder OPI is the most-asked-for brand in the industry. Each bottle contains 0.5 oz of polish. • Includes 1 OPI nail polish and 1 OPI GelColor gel nail polish • Stays chip-free for at least 2 weeks • Gel polish cures streak-free in just 30 seconds • Easy to apply and easy to soak off/remove • Does not contain toluene, formaldehyde or DBP • Each bottle contains 0.5 fl oz of polish