The iPV Aspect K1 Replacement Pods are designed to work exclusively with the iPV Aspect Pod Kit. The Aspect's refillable cartridge is equipped with a 2mL e-juice capacity and a resistance of 1.0 ohm. The Aspect K1's exclusive feature being the adjustable airflow control. Most pod systems do not allow you to adjust the air flow, consequently limiting your vaping experience to what they want instead of what you want. The Aspect's pod is bottom filling and has 2 strong magnets on the bottom to keep it from popping off in case of a fall.