Andis 64240 CeramicEdge clipper blade, size 7FC. Leaves Hair Inch 1/8 ". Leaves Hair mm 3.2 mm. CeramicEdge blades feature a certified zirconium oxide ceramic cutter blade. CeramicEdge blades offer the following advantages Higher durability, stays sharper longer. Cutter runs 75% cooler than steel. Feature a smoother, faster cutting feel regardless of length or density. Break resistant material. For Andis detachable blade clippers. Can also be used with other brands of detachable type clippers.