Frontiers Extra O2 Tube

Frontiers Extra O2 Tube is a 5-star Kit in Arknights: Endfield. Base stats: Defense +21, Agility +32, Intellect +21, Secondary Attribute +20.7%. 3-piece set effect: Wearer's Combo Skill Cooldown Reduction +15%. After the wearer's skill recovers SP, the team gains DMG +16% for 15s. This effect cannot stack.

Stats

Defense+21

Agility+32

Intellect+21

Secondary Attribute+20.7%

Level 70 Kit ★★★★★

Artificing: stats at each upgrade level

Stat	Base	+1	+2	+3
Agility	32	35	38	41
Intellect	21	23	25	27
Secondary Attribute	20.7%	22.8%	24.8%	26.9%
Progress required	0	6	12	20

Artificing consumes Catalysts and gear of the same rarity and type. The numbers above are the exact values at each level.

3-piece set effect

Frontiers

3-piece set effect: Wearer's Combo Skill Cooldown Reduction +15%. After the wearer's skill recovers SP, the team gains DMG +16% for 15s. This effect cannot stack.

Which operators this fits

This piece raises Agility + Intellect — it fits operators whose main attribute is Agility + Intellect (computed from official stats, not a subjective ranking).

Akekuri Antal Arclight Ardelia Camille Chen Qianyu Endministrator (F) Endministrator (M)

Full Frontiers set — 14 pieces

Frontiers Analyzer Frontiers Armor Frontiers Armor T1 Frontiers Armor T2 Frontiers Armor T3 Frontiers Blight RES Gloves Frontiers Comm Frontiers Comm T1 Frontiers Extra O2 Tube Frontiers Extra O2 Tube T1 Frontiers Fiber Gloves Frontiers Fiber Gloves T1 Frontiers O2 Tube Frontiers Protection Suit

Equip any 3 pieces from this set to activate the set effect.

FAQ

What is the set effect of Frontiers Extra O2 Tube?

3-piece set effect: Wearer's Combo Skill Cooldown Reduction +15%. After the wearer's skill recovers SP, the team gains DMG +16% for 15s. This effect cannot stack.

Is it worth upgrading Frontiers Extra O2 Tube with Artificing?

Agility goes from 32 at base to 41 at maximum Artificing.

What is Frontiers Extra O2 Tube?

Frontiers Extra O2 Tube is a 5-star Kit in Arknights: Endfield.

Full profile

The standard Frontiersmate oxygen tube guarantees at least 4 hours of heavy duty underwater operations thanks to its oxygen cycler technology. The upgraded version further extends this duration to 6 hours.