Hi. I have it’s “sister” the 3700 Pro which makes cappuccinos and lattes, but it’s the same size portafilter. I bought the Hughes 51mm single wall basket and it works great. I also just got this bottomless portafilter recommended on here. CAPFEI 51mm Bottomless... https://www.amazon.com/dp/B0BM39QM8P?ref=ppx_pop_mob_ap_share. Hope this helps.