Presso's E-61 standard bottomless portafilters fit E61 group head machines. They Do Not come with baskets. The bottomless portafilter facilitates honing in on your espresso's performance for tweaking until perfect.
Tried and tested, to match to all Rocket and Wega espresso machines, this portafilter may fit other machines as well, though we advise ensuring it does before confirming your purchase.