# What part numbers should I use for LDK licenses?

*This page applies to Harlequin v13.1r0 and later; both Harlequin Core and Harlequin MultiRIP.*

LDK orders should use part numbers which are constructed as:

`H<OEM number><decimal part no>`

where:

`H`

is constant and identifies it as a Harlequin part number within Global Graphics.

`<OEM number> `

is written in hexadecimal. For example, the HHR evaluation customer number is 99 decimal, which equates to 63 hex, so evaluation LDK part numbers start with `H63`

.

`<decimal part number> `

is effectively an arbitrary four-digit number. For example, the number for ColorPro is `0201`

.

Taking those examples together, the whole LDK part number for ColorPro for an HHR evaluation RIP would be `H630201`

.