Round head size: 5.2*22.5cm ( with slight deviation) Flat head size: 5.2*22.5cm ( with slight deviation) Weight: gross weight 326g, net weight 287g Material: stainless steel + acrylic Stainless steel body, high-end and generous, slim body, no space Acrylic transparent material, visible remaining capacity Turn the screw below to freely adjust the grinding thickness All-electric design, just install the battery, convenient, high-end, creative, stylish Operation method: Install 4 batteries of No. 5 and unplug the grinder, put in the things to be ground Press the button above to grind the grinder to work The grinder stops working when you release it Tips: This product is only suitable for grinding seasoning ingredients such as pepper and pepper, not suitable for hard objects such as rice and coffee beans