Herb grinder is made from premium zinc alloy, thicker, heavier, and more durable. It is small enough to fit in your pocket and very portable for travel grinding. Ensure you a smooth twist and an efficient grinding for herb, spice or tea. The high quality metal teeth have exceptional durability. The Grinders designed with 4 pieces and 3 chambers. It is easy and convenient to assemble, use, and clean.Thin Poly O-Ring for smooth grinding and less friction.Colors:Red, Blue, Black, Silver, Green, Gray.Size:1.6 Diam. * 1.38"H