Pyrometric Self-Supporting Cones are the most accurate and easiest to use witness cones available. They provide the same information as Orton Large Cones. The advantage of Self-Supporting cones is that they are the correct height (1 3/4" exposed above the base) and have the 8 degree bending angle built in. The Self Supporting Cone was developed to help to eliminate some of the errors and deficiencies with the large cone.
