HR2-917-21/Natrix 2 #21 (F09), 185 ml - 0.012 M Sodium chloride, 0.08 M Potassium chloride, 0.04 M Sodium cacodylate trihydrate pH 6.0, 50% v/v (+/-)-2-Methyl-2,4-pentanediol, 0.012 M Spermine tetrahydrochloride. Please note items from this supplier are non-returnable.