Unfortunately, the inner diameter of the hose is not an available measurement of the product.
No it probably will not fit on your bathtub spigot. I can provide a better response if you upload the picture of the bathtub spigot.
Yes it does. One note the flow out of it is very low
This sink sprayer attaches to a standard threaded sink or tub faucet. The blue leaver is to turn flow on/off. That’s it. There is no where to introduce soap
It will work on newer standard threaded spouts. Will not work on the older spouts that are not threaded. If you can stick your finger up into the spout and the sides are smooth (one I had was kind of a square opening) it will not work
the adapter with it will install on female or male spouts
Yes It can!
No. And an adapter is likely not available. I had the same issue and used a garden-hose Y-adapter to solve the problem. The hose remains attached and you use the Y-adapter to use the sink faucet directly.
Unlikely. I researched faucets before buying and there are a variety of threads. This fits a common thread, but there are many others.
I had to remove the existing connector on my faucet. All the parts needed to connect your new rinser are included in the package. Hope that helps!