Check the listing for details. OPI START to FINISH Mini 1/8 oz (6-PACK) Formaldehyde Free Formula. Color: Clear, Condition: New without box. Listed at 11.99 USD. OPI MINI Start to Finish Formaldehyde Free 1/8 oz 6 - PACK The OPI Start to Finish 3-in-1 Nail Treatment combines base coat, top coat, and natural nail strengthener in one! This multi-use formula can be used seperately as a base coat, top coat, or nail strengthener. Prevents nails from getting stained, chipped, and weakened. Contains 0.5 fl oz of polish. Base coat, top coat and natural nail strengthener in one high-performance formula How to use: As a base coat, apply before nail polish to prevent nails from getting stained. As a top coat, apply over nail polish for a fast-drying, high-gloss, protective shine. As a natural nail strengthener, apply two coats on natural nails every other day to strengthen and harden natural nails. Remove weekly.