How thick are the two tabs/wings on the portafilter? I have an E61 machine, but the tabs are only 5m thick on mine...

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!
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We measured the tabs on a couple of the Expobar bottomless portafilters. The tabs are 6.5 mm at their thickest point.
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