Our stainless double sieve/strainer has an integrated set of support arms that allow you to use it on top of a five, or six gallon pail. The sieve consists of a coarse, flat upper screen and a finer convex lower screen. The top screen is a No. 14 (14 openings per inch or 1.4mm). The bottom screen is a No. 40 (40 openings per inch or 425 microns).