ColumnShield HPLC FingerTight Precolumn Filter provides economical protection from the harmful effects of sample and mobile phase particulates on modern HPLC columns. The disposable filter was engineered to maintain the efficiency of high performance columns assuring insuring no loss of critical resolution. With its simple design, the filter installs in any analytical column or guard column in seconds and is leak tight to 5,000 PSI. To install simply hand tighten the filter as you would with any fingertight fitting while holding the column stable.