DURAN® YOUTILITY laboratory bottles, brown glass, 250 ml, GL 45, 4 unit(s)DURAN YOUTILITY laboratory bottles, brown glass, 250 ml, GL 45 Material: DURAN glass. Autoclavable: yes. Specially shaped recessed grips for easier and safer handling Slim bottle shape allows more space saving use Scale indicating total volume Predefined labelling space Ergonomically shaped screw cap with leak proof sealing system for optimal handling, even by users with small or gloved hands Optimised thread (compatible with DIN GL 45 closures) for