Large Funnels, fitted with special cylindrical spouts 25
mm (1 in.) in diameter for 9.5-mm (3⁄8-in.) maximum size
particles and 13 mm (1⁄2 in.) in diameter for 2.00-mm (No. 10)
maximum size particles. The length of the spout should be
greater than the full length of the permeability chamber—at
least 150 mm (6 in.)