The hop spider sits on the edge of your kettle. Hops are poured directly into the spider during the boil. It can hold about 10-11 oz of hops. Made from 304 stainless steel. The mesh is 0.2 mm aperture so it will capture 99% of the hop material. The basket is 13.75 in (35cm) high with the opening at the top being 5.9 in (15cm) diameter and tapers down to a 3.9 in (10cm) diameter at the bottom.