These Savinelli charcoal filters are highly absorbent and designed to fit with pipes that accommodate 9mm filters, helping reduce moisture and provide a drier smoking experience. They're especially perfect for Savinelli pipes with 9mm drilling. At the ends of each filter are two flat ceramic caps that are highly heat resistant and feature ventilation holes that provide a natural draw and excellent air flow. Here presented in a smart looking special edition tin of 100 filters that celebrates the 2,776th birthday of Rome.