Herb Grinder by CHIEF - Aircraft Aluminum, 2.23", 4 Stage, 3 Chambers, 28 Teeth, Pollen Catcher (Red) Backed by CHIEF Grinder's 100% Lifetime Warranty, No-Hassle Returns Heavier, True Aircraft Grade Aluminum Alloy - Unlike other grinders (cheaply light in weight), our 4 piece casing construction feels solid and heavy in your hands 28 CNC Precision Milled Teeth - Provides razor sharp, fast and easy grinding using a plastic seal o-ring for smooth twisting 3 Chamber Compartments - Pollen catcher screen mesh, storage, and teeth grinding section up top with an extra 1/2" in height for more grinding capacity 2.23" Diameter x 1.75" Height - Large enough to grind a gram~ of herb or spices at one time, but compact enough for travel