22 pieces Spectrum Tubes Only
1. Carbon Dioxide 2. Nitrogen 3. Oxygen 4. Neon 5. Argon 6. Chlorine 7. Ammonia 8. Iodine 9. Sulfur 10. Krypton 11. Cadmium 12. Mercury Vapor 13. Alcohol Vapor 14. Water Vapor 15. Hydrogen 16. Sodium 17. Helium 18. Air Specifications.........