The triaxial cell is constructed of stainless steel for soil sampling. The standard unit features a see-through Plexiglas external cell wall. The advantages of the external cell wall are that after the specimen is completely ready for a test, the cell wall is lowered over the cell and fastened into place with a minimum of disturbance to the test sample. All the standard triaxial cells can accommodate smaller diameter specimens using optional platens. These triaxial cells accept specimens with a length of 2 to 2.5 times the diameter. Max specimen diameter is 150mm.