Waterworks Transit Thermostatic Control Valve Trim Kit With Handle Chrome. This is the trim kit. The rough valve is sold separately and available from Waterworks as well as pre-owned from eBay. These were used and installed on a high rise project we did prior to Covid. We liquidated the building after Covid and kept all the plumbing fixtures. They are now available at a deeply discounted price to you. Here is the model number of the compatible shower valve needed for install GUBP81
eBay