Certifications/Compliance: USP Type I, ASTM E438 Type I, Class A. For Use With (Application): Ideal for removing interfering substances in quantitative analysis for cyanide. Includes: Absorber jacket, absorber top, cold finger condenser, cold finger jacket, 1000mL distilling flask, and inlet tube, ClearSeal™ grease-free joints and medium frit. Material: Borosilicate Glass.