How do I check Business object set type for a particular field

Hi,

I have a requirement to make the  DESCRIPTION field editable  for Internal Goods and Service .I have done it for Limit shopping cart with following details in the below configuration

Goto SPRO->SAP Supplier Relation ship Management

                         ->SRM Server

                             ->Coss applications and settings -> Extensions and Field Control

                                      ->Configure field control->configure control for fields substructure (in tabs field)

Bus. Object Set Type  32  

Structure Field Name   DESCRIPTION

Bus. Object Type        BUS2121

Set Level                    ITEM    

field editable               checked

But for  Internal Goods and Service which Bus. Object Set Type should i use to achive this

Thanks

Vivek