Multiangle & Volume, Lightweight, Longer and Fuller, KPEI31~34,, KPEI35N,36N – 25mm, KPEI40~45 – 20mm For best results, use with iENVY Lash Adhesive. Always remember to check fit. Lay eyelash on top of your natural lashes and trim if needed. Give your glue enough time to become tacky before applying lashes. Wait 30-60 seconds for optimal results and hold lashes in place when applying, allowing the adhesive to dry completely.