5 cartridges at a time and 2 are defective. This store has a 10 day return policy and there is no way I can smoke 5 carts in this period of time to find a defective one. I spend $200.00 or more when i come and have been a customer for over 2 years. When i called to see what could be done the employee spoke with the manager and came back and offered me nothing and the manager should of took the call. Hard to believe i got treated like shit. Tired of buying defective products and the store has a limited return policy. I'll never buy from here again!