1) Manufactured from ambered DURAN borosilicate glass 3.3. DURAN is a neutral glass, classified as a Glass Type I according to USP <660>, EP (3.2.1) and JP <7.01>, and meets ASTM E438, Type I, Class A requirements 2) USP <660> (Spectral Transmission) and EP (3.2.1) compliant. Less than 10% spectral transmission between 290 nm and 450 nm. 3) The amber colour is only applied externally ensuring that internal surfaces have standard DURAN clear Type 1 glass properties 4) Very durable and chemically resistant amber colour 5) All glass components and therefore suitable for storage of aggressive materials 6) Tight closure due to standard taper ground glass joint 7) Fired-on, highly durable white ceramic print