This will depend on the hazards and risks present at your workplace. It is important to review your Risk Assessments to identify the hazards and risks and therefore likely injuries. You should then complete a First-Aid needs Assessment to determine what would be adequate and appropriate for your organisation in terms of first-aid provision which includes what you should keep within the first-aid box.
We can work with you to help you complete this process if required, call our team on 01666 503 686 for an initial chat.
Alternatively, read the blog here with more information about completing a First-Aid needs Assessment.