The Superior tetsu helm is a melee helm made in the Player-owned ports minigame. The best non-Dungeoneering armour of its type, it requires 85 Defence to wear. The helm can be made at 90 Smithing in the port's workshop, using 40 Plate and giving 10,000 Smithing experience.
The Superior tetsu helm lasts for 12 hours in combat before degrading and requiring repair. It can be repaired at a player-owned housearmour stand, costing 300,000 coins at 99 Smithing.
Upon death, this item will appear under your gravestone and if killed in wilderness it will turn into 750,000 coins for the killing player regardless of charge.