This is an Oster Cryogen-X Size 10 blade for electric Oster Pet grooming clippers. This appears to be new in package as far as I can tell. It is part number 78919-046. Oster is the number one recommended clipper by professional groomers and vets. This comes in the original package and it says that it stays cooler longer, which is very important. Please review the pictures for more details on the condition of this item. Please visit my store as we have a wider variety of items for sale and we will gladly combine items to save on shipping.