FREE SHIPPING $500.00 OR MORE CODE FSHIP12. NO CHEMICALS/GLASSWARE 1.800.967.5316 "6.44 ppt TDS solution (g/L) @ 25°C, 20 ml (25 pcs)" Quantity in Basket: noneCode: HI70038P Price:$23.00 Promotion Code: Quantity: "6.44 ppt TDS solution (g/L) @ 25°C, 20 ml (25 pcs)" Copyright © 2020 - BC Scientific. All Rights Reserved. Toll-Free: 1.866.597.5960 from 9:30am - 5:00pm EST Email: info@bcscientific.com