These are prefilled 90 gram Co2 cylinders that require a 88/90 gram adapter sold separately. They are one time use but get approximately 250 shots from each cylinder. These could be ideal as a back-up for your primary tank or for use as a light weight set up.

Features:

• Adapter required - Check here for Co2 adapters
• 2 prefilled 90 gram Co2 cylinders 
• One time use only
• Approximately 250 shots per cylinder