These high-grade steel blades are manufactured using advanced machinery with multiphased processes, and tested using composition analyses to ensure quality performance. Economy disposable microtome blades for routine sectioning are composed of high-quality stainless steel. Premium disposable microtome blades are used for routine specimens and biopsies; premium high-profile blades are chromium-plated. Chromium-plated enhanced durability blades are used for biopsies and dense tissues. 80 mm in length with blade angle of 35°.