This is a solid 304 stainless steel test sieve with a 30cm (about 12 inch) diameter and 10mm round holes. Perfect for sifting soil, gravel, sand, compost, seeds, or even industrial materials. The stainless steel won't rust or corrode, and the edges are rolled smooth so they're safe to handle. Great for gardeners wanting to screen rocks out of soil, for hobbyists, or even light lab use. Just pour your material in and shake – the holes are uniform and clean. Easy to rinse off after use. Much sturdier than cheap screen mesh. Available in other hole sizes from 1mm to 40mm if you need a different grade. A simple, tough tool that makes separating materials way easier.