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| Name | Type | Slot | Bonuses | Effects | Requirements |
| Ice Cooler | | | | | |
| Ice Gloves | Armor | Hands | | | |
| Infinity Gloves | Armor | Feet | Magic Attack +5, Magic Defense +5 | | Magic: 50, Defense: 25 |
| Infinity Top | Armor | Body | Magic Attack +22, Magic Defense +22 | | |
| Initiate Helm | Armor | Head | Crush Defense +11, Magic Attack -6, Magic Defense -1, Ranged Attack -2, Ranged Defense +13, Slash Defense +14, Stab Defense +13, Prayer +3 | | |
| Initiate Platelegs | Armor | Legs | Crush Defense +20, Magic Attack -21, Magic Defense -4, Ranged Attack -7, Ranged Defense +22, Slash Defense +22, Stab Defense +24, Prayer +5 | | |
| Initiate Platemail | Armor | Body | Crush Defense +38, Magic Attack -30, Magic Defense -6, Ranged Attack -10, Ranged Defense +44, Slash Defense +44, Stab Defense +46, Prayer +6 | | |
| Insect Repellent | | | | | |
| Insulated Boots | Armor | Feet | Crush Defense +3, Slash Defense +5, Stab Defense +4 | | Slayer: 37 |
| Irit Leaf | | | | | |
| Iron 2H Sword | Weapon | Primary | Crush Attack +10, Magic Attack -4, Ranged Defense -1, Slash Attack +13, Stab Attack -4, Strength +14 | | |
| Iron Arrow | Weapon | Ammo | | | |
| Iron Axe | Weapon | | | | Woodcutting: 1 |
| Iron Bar | | | | | |
| Iron Battle Axe | Weapon | Primary | Crush Attack +5, Slash Attack +8, Stab Attack -2, Strength +13 | | Attack: 1 |
| Iron Chainbody | Armor | Body | Crush Defense +19, Magic Attack -15, Magic Defense -3, Slash Defense +15, Stab Defense +10 | | |
| Iron Dagger | Weapon | Primary | Crush Attack -4, Magic Attack +1, Magic Defense +1, Slash Attack +3, Stab Attack +5, Strength +4 | | |
| Iron Dart | Weapon | Ammo | Ranged Attack +4 | | |
| Iron Halberd | Weapon | Primary | | | |
| Iron Helm | Armor | Head | Crush Defense +5, Magic Attack -6, Magic Defense -1, Ranged Attack -2, Ranged Defense +6, Slash Defense +7, Stab Defense +6 | | |
| Iron Key | | | | | |
| Iron Kiteshield | Armor | Secondary | Crush Defense +9, Magic Attack -8, Magic Defense -1, Ranged Attack -2, Ranged Defense +9, Slash Defense +10, Stab Defense +8 | | |
| Iron Knife | Weapon | Primary | Ranged Attack +5 | | |
| Iron Longsword | Weapon | Primary | Crush Attack -2, Crush Defense +2, Slash Attack +8, Slash Defense +3, Stab Attack +6, Strength +10 | | |
| Iron Mace | Weapon | Primary | Crush Attack +9, Slash Attack -2, Stab Attack +4, Strength +7, Prayer +1 | | |
| Iron Medium Helm | Weapon | Head | Crush Defense +3, Magic Attack -3, Magic Defense -1, Ranged Attack -1, Ranged Attack +4, Slash Attack +5, Stab Attack +4 | | |
| Iron Ore | | | | | |
| Iron Oxide | | | | | |
| Iron Platebody | Armor | Body | Crush Defense +12, Magic Attack -30, Magic Defense -6, Ranged Attack -10, Ranged Defense +20, Slash Attack +20, Stab Attack +21 | | |
| Iron Platelegs | Armor | Legs | Crush Defense +10, Magic Attack -21, Magic Defense -4, Ranged Attack -7, Ranged Defense +10, Slash Attack +10, Stab Attack +11 | | |
| Iron Plateskirt | Armor | Legs | Crush Defense +10, Magic Attack -21, Magic Defense -4, Ranged Attack -7, Ranged Defense +10, Slash Attack +10, Stab Attack +11 | | |
| Iron Scimitar | Weapon | Primary | Crush Attack -2, Slash Attack +10, Slash Defense +1, Stab Attack +2, Strength +9 | | Attack: 1 |
| Iron Sheet | | | | | |
| Iron Spit | | | | | |
| Iron Square Shield | Armor | Secondary | Crush Defense +7, Magic Defense -6, Ranged Attack -2, Ranged Defense +8, Slash Attack +9, Stab Attack +8 | | |
| Iron Sword | Weapon | Primary | Crush Attack -2, Crush Defense +1, Magic Attack +1, Slash Attack +4, Slash Defense +2, Stab Attack +6, Strength +7 | | Attack: 1 |
| Iron Warhammer | Weapon | Primary | Crush Attack +11, Magic Attack -4, Slash Attack -4, Stab Attack -4, Strength +9 | | Attack: 1 |
| Ivandis Flail | Weapon | | | | |
| Ivandis's Unenchanted Rod | | | | | |
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