Suorin Air Pro Cartridge has a convenient refillable 4.9mL e-liquid capacity and a coil resistance of 1.0 ohm. The pre-installed coil is designed to provide a low-wattage smooth vape for beginners to get them a new MTL experience. Use the bottom fill method. To fill, pull out the pod cartridge, lift the silicone tab back, and start filling. It has a longer service life than any other pods. Each cartridge can be reused up to 6 times. The built-in 1.0ohm mesh coil is made for your nic salt vaping. The flavor on this coil is slightly more pronounced, the thinner nic salt juice allows more flavor to come through. Suorin Air Pro Pod Cartridge also has an upgraded airflow system, adopts a LAVAL nozzle airway design, which can speed up the suction speed of airflow and achieve excellent flavor delivery. These pods attach firmly to the mod via a gold-plated proprietary connection.