Gauge blocks are readily available in a wide selection of shapes, materials, and accuracy grades. Starrett-Webber gage blocks includes: High-grade steel gage blocks for shop floor use, longer-lasting and non-corroding ceramic blocks. Top-of-the-line croblox® Chromium Carbide, are very stable, non-corrosive and have excellent wringability. A variety of sets are available in square- and rectangular-block versions. Individual replacement blocks and a range of related accessories are also available.