DURAEDGE® microtome blades are made of high quality, hardened stainless steel and manufactured to the highest standards for sharpness, consistency and durability. They are then PTFE-coated to reduce friction, section compression, and eliminate surface striations. Capable of sectioning tissue for biopsies in ultra-thin sections, DURAEDGE® microtome blades gives you unsurpassed precision in the lab.