These blades utilize high grade steel, employ advanced machinery with multi-phased processes, and test 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. 80mm in length with blade angle of 35°.