The GRAV Labs 4 Part Grinder is a high-quality smoking accessory that ensures a precise and efficient grinding experience. With its four-part design, this grinder allows for easy cleaning and maintenance, making it a convenient choice for any individual. The GRAV Labs brand is known for producing top-notch supplies, making this grinder a reliable option for those seeking the best of the best in their equipment. With observation window , removable magnetic aero cut sifter with handle. This unit is precisely cut with anodised aerospace aluminum so you can be sure that your buying a product that will last a lifetime both in looks and tooth sharpness.