Pays for itself using scrap glass to make frit! A four piece sifter set. Each individual sifter has a different mesh. Sifters nest with the largest mesh screen on top and progressively smaller screens follow to the bottom. Scrap glass is crushed with the mortar and pestle Frit Maker Item# 15350 (Sold Separate). Produces frit from coarse (5.2mm) to powder (.20mm). If more small frit is required, the coarse sizes may be recrushed.