Flammable substances (ex. aerosols and alcohol-based products) may be mailed only via surface transportation in accordance with U.S. postal regulations. Full responsibility rests with the consumer to comply with all postal and non postal statutes and regulations regarding mail. Information regarding postal statutes, regulations, and mailing requirements is available from your local Postmaster or Postal Service Business Mail Entry Manager, and at the Postal Service’s mailing standards Web site at www.usps.com.