Papa Joe's (&trade;) Colorado Crusher (&trade;) Tobacco Spice Grinder. Anodized Billet Aircraft Aluminum. 4 Piece 3 Chamber. Large 2.5" Anodized billet aircraft aluminum - Razor sharp diamond shaped cutting posts 2 1/2" diameter x 1 3/4" height 4 piece 3 chamber configuration Strongest lid magnet available Premium 500 micron mesh pollen screen