The inner diameter of the Non- Porous Filter Basket is 58mm, which is generally applicable to for 58mm Bottomless Portafilter. BUT 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 before purchasing. The product made of stainless steel is safe. It is very easy to clean and convenient to use for time. The product is slightly magnetic, allowed to connect to magnetic Dosing Funnel. Please read the product information carefully before buying, thank you! Colour: silver Material: stainless steel Package Contents: 1 x Single cup 1 x double cup 1 x Blind Cup 2 x Brush Only 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.