Large riffles the gold much like the riffles in a sluice box, leading to a faster panning process letting you process more pay dirt Gold Pan incorporates both and shallow riffle side wall, allowing better separation of gold from other heavy minerals similar to a sluice box Molded from high ABS, this gold pan is light weight, rust-free, UV resistant and floats Riffle Technology allows for all sizes of alluvial gold particles to be efficiently collected without missing any fine specs 4 different colors, black / blue / green / for sky blue, diameter: 38cm / 15-inch, Manufacturer: Bottone