Transparent Turbidity Tube, simple apparatus is used to determine the transparency of water in lakes, streams, oceans as well as other bodies of water, Contains: 60cm transparent turbidity tube, rubber stopper with Secchi disc, 20cm silicon tube, Hoffman's clip, steel
Spectrum Tubes - Sulphur, Length 26Cm, High-Quality Design For Greater Viewing Area, Effectively Demonstrate The Spectral Lines Of Pure Substances, For Use With Spectrum Tube Power Supply
Tube Rack Dispenser, 3-Tier, Dimensions: 12X5.5X16in, Nine compartments to organize and store tubes, Holds all sizes of tubes, up to 210 tubes, See-Thru for quick sorting by tube type, or cap, Constructed from durable 3/16 acrylic