Specification:MateriaI: Stainless steel, GlassSize: 19cm x6cm.Adjustable Coarseness:- Everybody has a different food taste and when it comes to finishing a meal off with salt, pepper or spice, we want the just right amount.- These grinders feature a mechanism which adjusts the coarseness of your grind.- Simply turn the knob at the top of the mills clockwise for a fine grind, or counterclockwise for a coarse grind.If you have any questions, please contact us in time, we will answer your inquiry within 24 hours.