Mechanical Sieve Kit designed for reliable grain size analysis. Five interlocking 2"-dia. x 13⁄8"L clear acrylic cylinders stack inside the 4"-dia. x 141⁄2"L ABS plastic frame. The Geotech Keck® Sieve Analysis Field Kit has 20 interchangeable stainless steel mesh wire screens that are graduated to U.S. Bureau Standards. The mesh sizes are 4 to 270. Shaking the assembled unit distributes the differently sized particles so that the percentage of volume can be read directly from the graduated support frame.