The walls with which the fastener is used must also be 2-1/2 inches to 3-1/2 inches thick

there is a flange that is 3 inches in diameter

Motor Type: Psc

The semi-recessed unit requires a rough opening that is 15-3/4 inches in width by 26-1/2 inches in height by 10-1/4 inches in depth

Measuring 1 inch (25 millimeters) in diameter

Haws 8111FP Freeze Resistant AXION MSR Drench Shower w/ Plastic Shower Head Capacity-44 oz The walls with which theHand Activation Wall Mount Full Body Coverage Area 1" IPS Supply Inlet Meets ANSI Standard Z358. 1 The HAWS model 8111FP is a freeze protected, wall mounted drench shower with AXION MSR ABS plastic showerhead. The unit also includes flow control for the showerhead, a brass stay open ball valve with stem and stem extension for maximum wall thickness, a stainless steel push flag, and a universal sign. From the Manufacturer: Model 8111FP AXION MSR freeze