Upgraded Ceramic Burr for JavaPresse Manual Coffee Grinder - Version 3 Patent Pending - Industrial Grade Nylon Components Built with industrial grade Polyamide Nylon 6 and ceramic parts for enhanced durability. Improved 2017 conical burr uses a new patent pending aerodynamic design to grind beans 25% faster than previous burr versions, and provide superior consistency. Easy to clean and rust-free. 1 burr assembly included in each pack. Designed to fit 2015 onward versions of the JavaPresse Manual Coffee Grinder. Using this burr for other brand grinders will cause damage over time and is not covered under warranty. All Grinders purchased after July 31st, 2016 have the V2 burr installed for enhanced durability. This is Version 3. 12-Month Product Guarantee.