Thank you for taking an interest in part number MCFARLAND 0 5, that of which is a Adams Scientific Inc product listed with description "Reference Standard Mcfarland Nephelometer". In addition to being listed with part number MCFARLAND 0 5, this particular offering also has the NSN 6550012569683, further allowing you to ensure that you only procure the exact aerospace parts you require for your operations. If you would like to begin procurement for your desired NSN parts or simply want to know more about this listing, be sure to fill out and submit the RFQ form provided below with as much information as possible.