The GRAV® Grinder is 2.5" tall and made of anodized CNC aluminum. The 15 teeth and holes in its upper chamber are well-spaced to prevent clogging. Three polycarbonate windows in the central chamber allow a snapshot of the grinder's contents. Its bottom chamber features a magnetic kief screen that can be removed for easy scraping using a GRAV® aluminum scraping tool. The edge of the tool is curved to perfectly fit the interior curve of the grinder.