5 GALLON BUCKET CLASSIFIER SCREEN: Soil sifting mesh classifiers will fit on top of 5 gallon bucket and our 14" gold pan; Interlocking, stackable design; Top Diameter: 13.25", Bottom Diameter: 11" RUGGED WEATHERPROOF DESIGN: Constructed from high-impact durable ABS plastic with 304 stainless steel wire mesh; will not rust or corrode under normal wear CLASSIFIER SIFTING SCREEN SIZE: 1/30" - 900 Holes per Inch GOLD PROSPECTING EQUIPMENT: Classifying your raw material down is imperative for successful gold recovery; sifting out large rocks and soil from your high-yielding pay dirt before working it through your gold pan or sluice box MULTIPURPOSE SIFTING PAN SCREENS: Ideal for many different purposes and a wide range of materials; nothing is off limits with these classifier sifting screens