Ro-Tap Sieve Shaker by W.S. Tyler - Gilson Co.
SS-31 12in Ro-Tap® Sieve Shaker holds up to four full-height 12in/300mm diameter test sieves and pan, six intermediate height sieves and pan, or eight half-height sieves and pan. 12in sieves have more than twice the effective sieving area as 8in sieves. Recommended for separations of particle sizes ranging from 1/2in—No. 500 (12.5mm—25µm).