Thank you for your question. We do offer many different kinds of R10000 rough in valves and it depends on what kind of piping you are using as to which one you use. Here is a list of what all the letters mean after the R10000 number.
UN-universal valve can be used with copper, iron pipe, pex or cpvc piping
BX-is an individual box instead of a case of 12 rough-in
WS-screwdriver stops means you can turn the water off at the valve instead of shutting off the water in the whole house.
HF-high flow valve can only be used with a shower only faucet.
T-thin wall mounting kit included.
IP-can only be installed with a iron pipe.
PX-can only be installed with pex piping
MF-used for pex cold expansion connections