Acrylic Herb Grinders our by far our best-selling type of herb grinder. Inexpensive, effective, and available in a range of colors too. With regular cleaning and maintenance, the lifespan of an acrylic herb grinder can be maximized. We carry 2-part and 4-part acrylic herb grinders and have variable grinder sizes from 30mm through to 60mm and above. Get your acrylic herb grinder Today.