If you are familiar with inventory duties or other tasks related to product inventory, talk about these tasks and how they play a role in your current or previous positions. These details could include how often you are required to count inventory, how many SKU's you track, whether you divide inventory responsibilities with other team members, or a specific system you used for maintaining inventory.
If you do not have related experience, be transparent about this fact. Rather than leading with an 'I do not have...' statement, try leading with what you do offer. Perhaps that includes excellent organizational skills or a superior ability to track items in Excel spreadsheets.