EXW price clear reagent bottle 250ml GL45 screw cap for lab Reagent bottles DURAN®, clear/amber, pressure resistant DURAN® reagent bottles, DIN thread, ISO 4796. Pressure resistance, as a result of amended shape, in the range of -1 up to +1.5 bar (tested by the TÜV in accordance with DIN EN 1595, with GS mark).