Volume of Dosage
1. Compare with 7 injection parts, pump weight would be 3.5g cost-saving, and eco-friendly.
2. During locking situation, spring is isolated, never touch with bulk before first use, which could prevent spring corrosion.
3. Unique rib design, pump head could be adjusted to any direction.
4. Simplified structure, housing's tonnage in bottle would be 1ml less, the bottle volumn could be 1ml less accordingly, cost-saving, and eco-friendly.