Thank you for showing your interest in Logbook from Diabetic Care Products. The Logbook is a product of Lifescan and is thereby made of the highest quality. If you have any questions regarding Logbook or any product in Diabetic Care Products, please contact us. Our experienced personnel will answer any questions you have about Logbook. Also, if you are interested in purchasing large quantities of Logbook or any Diabetic Care Products, please contact Customer Service.