Bottomless Portafilter designed to work with all Rocket Espresso machines. Manufacturer SKU RA99905022. Width 58mm. Chrome Plated Brass. Includes 21 gram Filter Basket. Fits all Rocket Espresso Machines: Giotto, Cellini, Mozzafiato, Appartamento and R58. And other machines: Quick Mill, Izzo Alex Duetto IV, Isomac Millenium, ECM Giotto, Grimac, Grimac Valentina.