This four (4) piece frit sifter set contains a different size mesh screen in each sifter. The tubs are 152mm (6") in diameter at the top, 95mm (3-3/4") in depth with a 114mm (4-1/2") screen diameter. Sifts frit to produce the following sizes: <0.2mm 0.2 - 1.2mm 1.2 - 2.7mm >2.7mm