Life Orb: 30%
Plate Items: 20% (type only, for example, splash plate only boosts water)
Gem Items: 30% (type only, for example, normal gem only boosts normal, single use)
Muscle Band: 10% (physical only)
Wise Glasses: 10% (special only)
Odd Incense: 20% (psychic moves only)
Rose Incense: 20% (grass moves only)
Sea and Wave incenses: 20% (water moves only)
Rock Incense: 20% (rock moves only)
Black Belt, Charcoal, Miracle Seed, Mystic Water, Dragon Fang, Hard Stone, Black Glasses, Magnet, Metal Coat, Never-Melt-Ice, Poison Barb, Soft Sand, Twisted Spoon, Silver Powder, Spell tag, Sharp Beak, Silk Scarf: 20% (type only, for example, sharp beak only boosts flying moves)
Soul Dew: 20% (psychic and dragon moves only, Latias and Latios only)
Adamant Orb: 20% (dragon and steel only, dialga only)
Lustrous Orb: 20% (dragon and water only, Palkia only)
Griseous Orb: 20% (dragon and ghost only, giratina only)
Source: https://m.bulbapedia.bulbagarden.net/wiki/Type-enhancing_item
Hope this helps!