The green coffee grading system of Costa Rica is based on altitude and hardness. The three classifications are Strictly Hard Bean (SHB), Good Hard Beans (GHB), and Medium Hard Beans (MHB). Strictly Hard Beans are grown at elevations above 3,900 feet (1,200 meters), Good Hard Beans are grown between 3,300 to 3,900 feet (1,000 to 1,200 meters), and Medium Hard Beans are grown between 1,600 to 3,000 feet (500 to 900 meters).