A must-have item for gold panning and mineral recovery, this classification screen will aid your efforts by sorting your raw materials based on size. These rock and gravel screens are made of tough, high-impact plastic and 0.35mm stainless steel wire. This design is made to fit easily into a 5 gallon bucket and it matches the size of our 14" gold pans to allow easy transfer of materials from one to the other. Although gold is heavy, small flakes will not be able to displace larger rocks from your initial sample. Screening or "classifying" material into groups based on size will ensure that any gold, whether nuggets or flakes, will not get lost. In addition, looking through similar sized materials is a faster and more effective way to sort and will speed up the panning process, resulting in more gold! This 1/20" mesh size is a great all-around size for separating larger materials from finer, gold-rich sediments.