Our new line of plain aluminum grinders are the best in the business! They are machine made out of pure aircraft aluminum ensuring premium quality. Our new plain grinders aren't just plain silver becasue that's boring, they come in all different colors and sizes! We offer two different sizes in various color. The first size herb grinder we offer is our 2.25" or 56mm. They come in 6 wonderful colors including blue, red, green, gold, black, and turquoise. Two of our most popular in this particular size are the plain black herb grinders and the plain blue herb grinders. The other size we offer is just a little bit smaller at 1.85" or 48mm. It comes in 4 colors and it is a perfect size for mobile pocket use. The colors we offer are black, pink, purple, and turquoise. The plain purple herb grinder is one of our best sellers. Nobody else offers the variety we have and nobody can match our prices!