The Nitrous Express 15 pounds nitrous bottle with standard L45 valve features a tough and attractive powdercoated finish. The bottle comes with 6.89 inch diameter and 26.69 inch length and includes a high flow bottle valve. The new aluminum "Lightning 45" valve is the highest flowing bottle valve on the market. Even with the use of a high flowing solenoid, you still have to have proper flow to the solenoid. "Lightning 45" bottle valve was a result of the steps that were taken to match the flow characteristics of the bottle valve with that of the solenoid.