#12 Sally Hansen Diamond Strength Instant Nail Hardener, 3478 Clear, 0.45 Ounce #11 Quimica Alemana Nail Hardener 0.47oz (Pack of 4) w/Free Nail File #10 LONDONTOWN Kur Nail Hardener and Base Coat #9 Delore for Nails Organic Nail Hardener and Nail Polish Dryer.25-Ounce (Pack of 2) #8 Quimica Alemana. Esmalte Endurecedor para Unas #7 Nail Tek, Nail Strengthener Xtra 0.5 oz #6 OPI Nail Envy Nail Strengthener #5 Valmy Lemon & Garlic Quimica Endurecedora – Nail Hardener #4 PS Polish Nail Strengthener, Nail Hardener, Natural Safe Non-Toxic Professional Nail #3 MYSTIC NAILS Base Coat Top Coat Strengthener Nail Hardener 15ml – 0.5 fl oz #2 Prolana Nail Optimizer One-Step Multi-Use Nail Fortifier, Nail Hardener #1 Quimica Alemana Nail Hardener 0.47oz “Pack of 2”