Flaretop Chimney 417B

How the retail listing describes it

• Fits Most Large Oil Lamps: 3" bottom opening designed to fit standard large-size oil lamp burners
• Official Replacement Chimney: Designed as a direct replacement for Lamplight Flaretop Oil Lamps – Model 417B
• Durable Clear Glass: 8.5" tall high-quality glass chimney provides consistent airflow and steady flame performance
• Improved Flame Stability: Flaretop design helps reduce flickering and supports efficient oil burning
• Recommended Use: For best results, pair with Lamplight Ultra-Pure or Medallion Lamp Oil (sold separately)

That wording is the copy running on the retail listing, reproduced as it stands. The figures in our table above are the ones to go by when you order a spare part, and our parts finder puts every measurement side by side.