Eudiometer, Demonstrate the combining volume ratios of gases, Platinum electrodes included, Long, sturdy glass tubes have platinum electrodes sealed at the closed end with a 2 mm arc gap, Tubes are marked with a permanent brown scale in 0.1 or 0.2 mL divisions, Size: 100ml
Exo Terra Cricket Pen Large, Complete cricket care kit, Removable, well-ventilated lid, Easy cricket dispenser, Includes cricket food dish and water bowl, Makes cricket feeding neat & tidy, tubes remain in positio