"This 4 layer grinder is shaped like a 3D mushroom 2" circumference, interior grinder 1.5" diameter Made of aluminum 1st Layer-Top safety magnetic top closure 2nd Layer-Sharp grinder teeth for effortless grinding 3rd Layer-Stainless steel mesh screen filters very fine pollen into the bottom catcher 4th Layer-Pollen/Keif catcher with plastic spatula Intended for tobacco use only"