... 3,admixture:0.05%max 4,robusta coffee bean green 5,Smooth, mellow. 1. Vietnam robusta coffee grade AA, screen18Moisture: 12.5% ... maxBlack & Broken beans: 2%Above screen 18: 90% 2. Vietnam Robusta coffee bean -Grade A, screen 16 Moisture :12.5% max.Admixture ... maxBlack & Broken beans : 2%Above screen 16 : 90% 3. Vietnam Robusta coffee beans Grade B, Screen 13Moisture: 13% max.Admixture: 1% max ...