Human Grade Grinder 7F (2.5")The Human Grade 2. 5" (63mm) 4 Piece Grinder features a diamond styled cut design to make for better grip and a stylish gradient painted coating. Built for durability and precision, it delivers a smooth, consistent grind with ease. Retail Unit: One (1) Grinder 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