The Human Grade 2.5" (63mm) 4-Piece Grinder with a rubberized coating offers a secure, comfortable grip and a sleek modern finish. Designed for smooth, efficient grinding, it features precision teeth, a pollen catcher, and durable construction built to last. Pieces: 4 (Four) An upper chamber, grinding chamber, pollen screen, and a bottom chamber for collecting the finer particles Size: 2.5" (63mm) It's the perfect size to take with you wherever you go Material: Aluminum. Not only lightweight but also extremely durable Finish: Rubber Coating Pollen Screen: The integrated pollen screen allows for the finest particles to be collected in the bottom chamber Scraping Tool Included: Comes complete with a scraping tool to make pollen collection a breeze