- 50mm Diameter.
- Sharp Diamond Teeth.
- Stainless Steel Pollen Screen.
- Pollen Catcher.
These 50mm 4-Piece Grinders feature 3 different stages, the first stage has sharp diamond teeth to grind your herb, the second stage has a stainless steel pollen screen where your herb sits once it has been grinded, and the bottom stage is the pollen catcher where all of your super fine herb will sit.