Ask the company directly for those details, if we don't have them to hand, we would gladly go measure the tub to get what you needed. If a company is unwilling to help you, they are likely to be unwilling to help you down the line.

We have been shopping for tubs and won't consider one we can't actually go and sit in to check the lumbar angle and overall comfort. We have found some bath showrooms are willing to get a tub in for us from the warehouse so we can test it, but we have had to drive upwards of an hour to see all the tubs we wanted to. Finally found what we wanted but it was exhaustive to get there. Haven't done the remodel yet, but hoping that our choice will be as good as we expect.