Step-Wedge block is used for thickness and linearity calibration. It can be available in 3 different materials Geometry: 4,5&10 Step- Wedge Calibration Block is a Special step block for thickness and linearity calibration. it goes from 1.0mm to 10.0mm (10step), 6.25 to 25mm(4step),2.5 to 12.5(5step), Blocks can be available in 3different types of materials(Carbon Steel, Aluminum and Stainless Steel)