Senkary 12 Pack Nail Buffer Block 4 Sided Sanding Block Files Professional Nail Buffing Blocks, Medium Grit (White) White Color:White Quality manufactured pulley for mountain rescue health_beauty_UK Quality manufactured pulley for mountain rescue EASY TO HANDLE AND USE Ergonomic design makes it easy to handle and use the inside material of the manicure sanding block is a very dense sponge with medium grit sanding surface on the 4 sides (all sides have the same grit 150 on each) using before applying nail treatments or nail polish Washable and reusable Nail Files Buffers Specifications: Color: white Material: very dense sponge Each block sizes: 9