Grade SPI-2. Very similar to ZYB(see below), this grade exhibits a mosaic angle as small as 0.8° +/- 0.2°. This grade is slightly less highly ordered than SPI-1 but is acceptable for most users. The lateral grain size can be up to 0.5 mm but can be as large as 1 mm. Note that this grade is slightly less "cleavable" than the 0.4° mosaic spread product, that is, SPI-1. Most workers find this grade more than suitable for all but the most critical samples, but priced low enough for routine use. Some users prefer this grade to SPI-1 because the cleavage steps are slightly wavy, so samples are held in place better (e.g. better adhesion). Dimensions = 10 mm x 10 mm x 1 mm