Perfect Addition to Espresso Brewing - Improve water distribution and eliminate channeling.Keeps Brew Head Clean - Protects the brew head from grounds being sucked up when Lever is lifted.Easy Rinse to Clean - Easily flushed out under the tap to remove any grounds from within.Note Given the thermal mass of the screen, it is recommended that it is placed in the portafilter and locked in just before turning on the preheat controller.Colour SilverMaterial stainless steelSize thick 1.7mm, diameter 51mmPackage Contents 2 x Coffee handle accessoriesOnly the above package content, other products are not included.Note Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.