KX Microwave Reaction Vials for Organic Synthesis. 0.5-2, 2-5 and 10-20ml volume options. Rated to a working pressure of 30bar (3MPa / 435psi) 1,3. Temperature operating range of 40-300°C 2,3. Manufactured from contamination free 1st class hydrolytic borosilicate glass. Re-sealable septa for multiple reagent additions and reaction monitoring.