Hamilton 80550 705CA 50µl Carbon Analyzer Syringe with Cemented 24g x 2" Point Style 3 Needle incorporates a special luer tapered hub cemented over a 700 series syringe. It is used in conjunction with total organic carbon analyzers to monitor waste water and environmentally sensitive water resources. Syringe parts in contact with sample are borosilicate glass, 302 stainless steel plunger, and 304 stainless steel needle.