Actually, it isn't. The instructions in the K-2006 are for both the 10 ml and 25 ml sample. In step 2 of their instructions, they don't say this step is for the 25 ml sample. It's actually for either sample size.
Instruction #5165 (for K-2000, K-2005, K-2005-SALT, K-2006, K-2006-SALT, K-2007...