The air from your HPA tank needs to flow to the chamber in a sealed rubber hose, and PolarStars expertise allowed them to make this product that excels at that. The PolarStar QD Braided HPA Airsoft 42 Airline measures 42 inches and allows air to flow without stopping.
Each PolarStar electro-pneumatic HPA system ships with one of these airlines. It will therefore work perfectly with all of them without modification.
The multi-stitched line prevents leaking, while the carbon usage keeps the airline safe from wear. You can expect the airline to last longer than low-quality hoses. As a precision-crafted component, you can expect no less from PolarStar.