mso489 is correct: Rossi is owned by Savinelli. Here’s the back story:
“A pioneer in bringing briar pipe production to Italy, Ferdinando Rossi was a contemporary of the Savinelli family. Though the two family’s too were competitors in business, they enjoyed a close friendship in their private lives. Just shy of a century after its founding, the Rossi family's marque came into the caretaking of Savinelli after Rossi found itself unable to adapt to the new marketing techniques post-WWII. This same friendship is also the reason why Savinelli has kept the Rossi name alive, calling it Rossi by Savinelli and focusing on quality & affordability in a historic brand.”
All of the recent Rossi pipes that I’ve seen are filterless. I have a few, and they are good smokers. If you like Rossi, then check out Savinelli. They have similar shapes and sizes, and are available w/filters.