does rope 1 manufacture these things? how are they going to use these things on a harness if they don't know the breaking strength of them? seems sketch to me. i guess they did do a failure test on the harness, but i bet they know what the webbing they use in the harness is rated to. seems they should get specs on the components before the make a harness out of them. i would ask for the name and number of the manufacturer since they don't know the specs on what they sell/use.
that said, looks plenty strong for hangin' purposes.