1.What Does 5:1 or 6:1 safety factor mean?
What is the meaning of 5:1,6:1 in the big bag information?

The big bag is rated to hold 5 times the SWL (Safe Working Load) that is listed on the label. 

This does NOT mean you can load the big bag with more than the SWL rating, but that the big bag is designed with a safetyfactor of over compliance.

Next:Do you have test report?