0.25/0.35l/0.45l/0.5l Aviation Al Alloy Gas Cylinder 30mpa High Pressure Air Cylinder Portable Oxygen Tank M18*1.5 Thread - Fire Respirators - AliExpress
Glass Low Form Beaker Set with 2 Glass Stirring Rods, 5 Sizes - 50, 100, 250, 500, and 1L, 3.3 Borosilicate Glass, Karter Scientific 213A9: Amazon.com: Industrial & Scientific