Mocal Thermostatic Sandwich Adapter (Mocal Oil Thermostat), Type 4 Engines (Tight Clearance Fittings), MOC-SP1TM18-8AN - Aircooled.Net VW Parts
Universal An10 Oil Cooler Adapter Sandwich Turbo With Thermostat And Fitting 3/4-16 Unf - Engine - AliExpress
Amazon.com: Honeywell Home CWIREADPTR C-Wire Power Adapter : Everything Else
Wasserstein 24-Volt Transformer and C-Wire Adapter for Google Nest Thermostat, Learning Thermostat, Thermostat E and Wyze Thermostat 24VAdapter25ftWhtUSA - The Home Depot
12518611289 MINI Cooper Replacement Thermostat Wiring Adapter - MINI Cooper Accessories + MINI Cooper Parts
Mitsubishi Adapter for Standard Thermostat - PAC-US444CN-1 / VPL24-210 | HVACDirect.com
N1 Common C Wire Adapter AC Transformer 24V 500mA Universal Compatible With WIFI Smart Thermostat and Doorbells. Nest, Ring, Honeywell, Ecobee, Sensi - White (2 Pack), New - Walmart.com
Honeywell Home C-Wire Power Adapter Selectable-flexible 24-Volt Programmable Thermostat Square in the Programmable Thermostats department at Lowes.com