175px: Anshenxiang:

Combustion time: about 30 minutes. It is best to use it during short trips or lunch breaks.

350px: health incense:

Combustion time: about 65 minutes. It is best to use it at home before going to bed or when entertaining friends.

525px: Longevity fragrance:

Combustion time: about 85 minutes. It is most suitable for office leisure or long-term use.

I hope I can help you.