Delta T17T097 Cassidy MultiChoice 17T Series Valve Trim (Chrome). The Delta T17T097 is part of the Cassidy Series. This valve trim features a TempAssure 17T Thermostatic Valve Cartridge, a back-to-back installation capability, and a solid brass forged body. It comes with a lever volume control handle, a temperature adjustment handle, and a bright, Chrome finish. This valve trim requires an R10000-UNBX rough valve body (sold separately).