ROOR grinder is only available in black color medium 4-piece aerospace grade aluminum grinder is a step up from the rest. Coming in at 2.125" tall by 2.35" wide. This grinder is ½" large than the ROOR 4-piece Small grinder, it can accommodate much larger quantities of plant material, has a larger pollen basin, and a stronger magnet. The tooth design and threading pattern are one of a kind and make this product a true leader in the industry This is our most popular grinder best quality