The inner diameter of the Non-pressurized Porous Filter Basket is 58mm, which is generally applicable to for 58mm Bottomless Portafilter. some 58mm Portafilter of original standard may not be deep enough to insert the Filter Basket. It is strongly recommended that you carefully measure the inner diameter and depth of for your Portafilter purchasing.The product made of stainless steel is safe. It is very easy to clean and convenient to use for the time. The product is slightly magnetic, allowed to connect to magnetic Dosing Funnel. read the product information carefully buying, Colour: silverMaterial: stainless steelPackage Contents:1 x Single cup1 x double cup1 x Blind Cup2 x BrushOnly the above package content, other products are not included.Note: Light 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.