Atomic First Stage Parts

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The Atomic Aquatics First Stage Parts kit has every O-ring, seat, and spring your technician needs to fully rebuild your first stage back to factory spec. Atomic regulators are eng ineered to exceptionally tight tolerances, and using genuine OEM parts is the only way to maintain that precision — aftermarket substitutes simply won't give you the same performance or longevity. Whether you're due for an annual service or freshwater flushed a saltwater dive, having the right parts on hand means your reg gets done right the first time.Pairs well with: Atomic 2nd Stage Service Kit, Atomic Aquatics Regulator Bag, and a DIN or yoke service port plug. Show more