Unused. Thank you. I purchased this new for over 20,000 yen. TWIN-TURBO TWIN-TURBO Titanium Alcohol Burner Combustion Accelerator TT-TITN The world's lightest combustion accelerator for alcohol burners. Maximum heating efficiency, CO emissions suppressed to 0 ppm. Red flames swirl. Heating efficiency is improved by approximately 40% compared to a windscreen that only covers the flame. Significantly reduces carbon monoxide and smoke emissions. Body weight: 47g Size when in use: Outer diameter 8.9cm x Height 9.3cm Material: Titanium plate thickness 0.5mm Accessories: Cork coaster Country of manufacture: Japan