Ace Glass 7200-24 Tube with 10 mm Disc, A (145-174 Micron), 18 mm

Fritted disc is angled approximately 15° from stem, permitting the small gas bubbles to rise from the disc surface without excessive formation of large bubbles. Tubes perform comparably to a horizontal disc, but construction allows their use in test tubes or flasks where a large opening is not available.Tubes are manufactured from Borosilicate glass.