Classic, timeless lines for this fully transparent grinder. 18cm 7" To get the best out of your Peugeot salt grinding mechanism, you should use: dry, coarse salts, with a diameter of 4 mm (0.16″) such as sea salt or rock salt (mined from an underground salt seam) Do not use your Peugeot salt mill for grinding: pepper or any other spice. damp sea salt, also known as grey salt, (Guérande, Ré, etc.). That is because its moisture content is so high that it will corrode the mill. Use a specific Peugeot mechanism for damp salt. Its shape and materials have been designed to resist salt corrosion.