Bialetti Replacement gaskets and filter for Venus/ kitty / Musa 4 cup Espresso Machine Replacement Parts Fits Bialetti Venus 4 Cup / Kitty 4 Cup / Musa 4 Cup Expresso Pots Includes One Filter and Three Replacement Gaskets Hand Wash Recommended Only for Bialetti 4 Cup Venus / Kitty / Musa, approximated OD 2-9/16 x ID 2