Geek Vape Aegis Boost Pro 2 Replacement Pods, offering a 4.5mL refillable capacity, Top Side Fill System, and utilizes Geek Vape P Coils. GeekVape Aegis Boost Pro 2 (B100) Replacement Pods Features: Pod Capacity: 4.5mL Construction: PCTG Fill-System: Top Side Fill Coil Support: Geek Vape P Coils Coil Installation: Press Fit Pod Connection: Magnetic