OPI Nail Treatment. OPI Avoplex Nail and Cuticle Replenishing Oil is designed to replenish your cuticles with moisture and suppleness. Rich in therapeutic, skin-loving Avocado Oil in combination with super antioxidant Tocotrienol 1000 times more powerful than regular Vitamin E plus feather-light Grape Seed, Sunflower, Sesame and Kukui Nut oils and Lecithin to restore essential moisture and lipids and nourish dry cuticles. Ideal for rough heels and elbows, too!