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Velocity cartridge columns have a modular part number structure starting with the digits "12." The next five digits correspond to a unique bed length/diameter combination, while the last two letters denote the packing material, resulting in a part number with the form "12-01234-AB."

Listed below are all possible bed diameter/length combinations and their respective part number segments. All you need to do to complete the part number is to add the correct two-letter packing code from the listing that follows this page (a comprehensive list of part numbers can also be viewed here or downloaded in pdf format.

Velocity cartridge columns are available standard in
three different bed diameters
(other select diameters available via special order.)

Part No.*	Bed Diameter	Bed Length	Full Description
12-02401-??	2.1 mm	15 mm	Velocity Column Cartridge, 2.1 x 15 mm
12-02402-??	2.1 mm	30 mm	Velocity Column Cartridge, 2.1 x 30 mm
12-02403-??	2.1 mm	50 mm	Velocity Column Cartridge, 2.1 x 50 mm
12-02404-??	2.1 mm	100 mm	Velocity Column Cartridge, 2.1 x 100 mm
12-02411-??	3.0 mm	15 mm	Velocity Column Cartridge, 3.0 x 15 mm
12-02412-??	3.0 mm	30 mm	Velocity Column Cartridge, 3.0 x 30 mm
12-02413-??	3.0 mm	50 mm	Velocity Column Cartridge, 3.0 x 50 mm
12-02414-??	3.0 mm	100 mm	Velocity Column Cartridge, 3.0 x 100 mm
12-02421-??	4.6 mm	15 mm	Velocity Column Cartridge, 4.6 x 15 mm
12-02422-??	4.6 mm	30 mm	Velocity Column Cartridge, 4.6 x 30 mm
12-02423-??	4.6 mm	50 mm	Velocity Column Cartridge, 4.6 x 50 mm
12-02424-??	4.6 mm	100 mm	Velocity Column Cartridge, 4.6 x 100 mm
*These part numbers require the addition of a two letter "packing code" to specify packing material. Click "next" below for more information on standard and custom stationary phases for your Velocity column.