The filter has two layers of mesh, a coarse layer and fine layer. and allows you to use one or both at the same time. The coarse strainer has 1000-micron mesh and the fine strainer has 500-micron mesh. The filter come with extendable arms that extend to fit over your bucket, pan or holding tank. Material Stainless Steel. Diameter 9.5", arms can extend to 400mm for large buckets.