Corning Pyrex Borosilicate Glass Cylindrical Narrow Mouth Weathering Test Tube, 100ml Capacity
These PYREX 100mL Weathering test tubes are graduated upward to 0.5mL in divisions of 0.05mL, from 0.5mL to 3mL in 0.1mL divisions, from 3mL to 5mL in 0.5mL divisions and from 5mL to 100mL in 1mL divisions. Made with a 3mm vent hole located 180° from the front of the tube. Tubes are designed for testing propane, butane and isobutane mixtures.