This product have 12 colors. Please click in my store to see. Double Sided with sponge inside One size is with Grit #100 and the other #180 Suitable for natural nails, false nails and nail extensions Great for Both Professional Nail Specialist or Nail Art Learner Essential Nail Art Tools for Filing Nails before Nail Treatment, Nail Extension, Manicure Procedures It can be Used to File Natural Nails, False Nails, Nail Extensions, etc. This is Perfect for Finger Care and Salon Usage Desires