11-Piece Rectangular Retort Stand Set with Bossheads, Clamps, and Rings Biology_Microscopy fitting 20 mm tubes below

fitting 20 mm tubes below and 26 mm tubes above for tall tubes and stirrers

each structure individually labeled for plate-tectonics units

suspending thermometers above hot plates or fixing specimens in orientation

where current through a coil closes a separate contact and shows how a small signal controls a larger circuit

5-inch height

11-Piece Rectangular Retort Stand Set with Bossheads, Clamps, and Rings Biology_Microscopy fitting 20 mm tubes belowEleven piece retort stand starter set combining a heavy duty rectangular base and rod with three support rings, three boss heads, and four vinyl coated clamps for complete apparatus assembly.