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Will this work on a commercial Rancilio ?
While this should work fine, the Rancilio Bottomless Portafilter will make for a better fit and a better aesthetic match, as it features the Rancilio-branded handle.
I have a Bottomless Portafilter from my now-retired Brewtus II. Will I be able to use it with the Brewtus IV-R?
Yes, you will-they are both 58 mm, E-61 group heads, so the portafilters will be interchangeable.
Where are the baskets to purchase for this?
Joe, Give us a call at technical support as we have quite a few baskets that will work.
What size basket comes with this? A double or single?
The bottomless portafilter does not come with a filter basket. It must be ordered separately.
Actually, I just got mine in the mail and it came with a triple filter basket.
Which is a good thing too, because WLL no longer lists the triple filter basket and I was about to order one elsewhere.
Is this compatible with Breville BES900XL?
The Expobar Bottomless Portafilter will only fit the Expobar. As far as I know right now, there is no bottomless portafilter for the Breville.
Thanks for answer my question, actually there is one for Breville, they call it 58mm Naked Portafilter, but it's out of stock.
How thick are the two tabs/wings on the portafilter? I have an E61 machine, but the tabs are only 5mm thick on mine where most E61's are 7mm thick. I can't turn the filter in the group head when they're 7mm thick. Thanks!
We measured the tabs on a couple of the Expobar bottomless portafilters. The tabs are 6.5 mm at their thickest point.