This Hop Spider keeps hops together during the boil. It can be used on all appropriate sized boil pots, including the Grainfather. Made with a coarser, 800 micron mesh, for maximum wort flow and increased hop utilization. While the sophistication of the Grainfather filter ensures hop trub doesn't make its way into your fermenter - the Hop Spider greatly reduces the cleaning effort post brewing. Designed specifically with a fitted hook which can be hooked onto the side of any brew pot or the Grainfather system support ring.This spider can be used for any kind of hops, whether it be pellets or leaf. Specs Diameter: 5.9" Length: 11.8" Material: 800 micron 304 grade stainless steel mesh, with stainless steel support band and single hook.