Description1PCS Electric Water Heater Anode Rod Replacement for 40-60L Sewage Outlet Water Heater Magnesium Rod Accessories Add Nut Item Description Material: Magnesium Quantity:1pcs Size( Diameter x Length ): M4 9 4points M6 13x195mm 5points M6 13x135mm 6points M6 13x195mm 6points M6 16x160mm 6points M6 16x180mm 6points M6 16x200mm 6points M6 20x200mm One-inch plating M6 20x250mm One-inch plating M6 20x300mm One-inch plating Package included: 1 Pcs X Magnesium Rod(Select the required size per the requirements)