To choose the right Velocity Holder Hardware kit, you only need to answer two questions.

1) What column lengths will you be using?

2) Do you need integral pre-column protection?

We offer two basic Velocity Hardware Kits - a Base Kit for using Velocity columns without guards or pre-filters, and a Coupler Upgrade Kit for adding pre-column protection capability to the Base Kit.

To use Velocity columns of a different length,
you only have to change the Holder Tube.