YMC semipreparative columns are assembled in a similar manner to 4.6 mm i.d. analytical columns.
The endfittings are screwed directly onto the external thread of the column tube to provide columns which withstand a maximum pressure up to 5000 psi.

The column endfitting should not be removed as this may result in damage to the packed bed.
They are available with 100, 150 and 250 mm lengths and 8, 10, 20 or 30 mm i.d. All have a distributor plate, fitted within the column endpiece to ensure homogenous distribution of the sample onto the column bed.

These columns have inlet and outlet fittings of the Waters-type with the distance between the ferrule and the end of the connecting tubing (sometimes called the pilot depth) of 0.13 inch (3.3 mm) and are identified by part numbers ending with WT.