Included 3 piece set sizes - 40 holes/inch, 50 holes/inch, 60 holes/inch high impact plastic- classifier screens are made with high-quality abs plastic formed around the stainless steel wire mesh ensuring that they can be used frequently in the field lightweight and durable: classifier screens are made from abs plastic | 304 stainless steel wire mesh screen | easy to carry with you diameter: 6" inches | ideal classifier screen for small gold panning operations and day trips ideal for gold prospecting, gem collecting, garden soil separation, classifying material, educational and government science projects. ideal size for small panning operations and day trips
