Blue Bowl Concentrator Kit with Pump, Leg Levelers, Vial - Gold Mining Equipment Concentrator kit includes the blue bowl, 3 plastic leg levelers, 1/4 ounce plastic vial, 750 gph 12V pump, 3' of 3/4" hose, battery clips, and instructions The blue bowl gold concentrator is completely portable and will quickly remove your fine gold from your concentrates. It is designed to work forever, with no moving parts to wear out or break Pre-screen your concentrates to at least 30-mesh using a classifier before adding to your blue bowl To recover micro-fines, prescreen the concentrates using a 50 or 100 mesh classifier Panning fine gold concentrates by hand is difficult and tedious. The blue bowl can recover gold as fine as talcum powder