UPDATE: This is now a 13-piece kit which contains both the MP-55 and MPN-55 (Version I and Version II) grouphead gaskets as well as the two P-110CA steam wand o-rings, making it a combination of the MP-96s and MPN-96s Pavoni kits. ** Our NEW made-in-Italy silicone gaskets have arrived! They are "silicone" red instead of bright blue, and we'll update the image asap! This kit is to Rebuild the Grouphead and Steam Valve on Millennium-model Europiccola, Professionale, and Stradivari manufactured after 2000. With both grouphead gaskets now included, you will end up with one extra gasket that you will not need. We also offer this kit with optional Silicone Piston Gaskets - see the drop down menu below to substitute the standard black piston gaskets with the red Silicone P-53 piston gaskets. The silicone gaskets are softer and therefore easier to install, and they should last longer under normal usage. Additional parts are needed for a complete rebuild, such as Sight Glass Gaskets, Heating Element Gasket and more depending on your machine’s age and version. Includes the following: 1 of MP-55 Grouphead Gasket 1 of MPN-55 Grouphead Gasket (you will install only one grouphead gasket) 2 of P-53 Piston Gaskets 1 of P-50 Piston Washer 1 of P-51 Piston C-Clip 1 of P-49 Shaft Gasket 1 of P-23 Steam Valve Gasket 2 of P-110CA Steam Wand O-Ring 1 of P-2 Knob O-Ring 1 of P-45 Boiler to Group Gasket 1 of MP-2 O-Ring for the Grouphead Sleeve 1 of 108-H Food Grade Grease —-Detailed Instruction Sheet included—- Note: To remove the C-Clip retaining ring, you will need a pair of “snap ring pliers,” such as one of these on Amazon: https://amzn.to/3GXOwGL Note that these are relatively inexpensive and intended for occasional use. See below or click here for a simple and inexpensive sleeve removal tool to help with the installation of the MP-2 O-ring. We also offer a more substantial tool modeled after the Pavoni factory version. See Stefano's How-To You Tube video to remove the MP-3 Sleeve here. https://bit.ly/SEC-MP3 Pavoni has made Millennium lever machines made since the year 2000. If you’re not sure if you have a Millennium or Pre-Millennium model, then click here for measurements.