The shape is strictly for physical mounting compatibility

The Trane GKT3081 Gasket is a precision-engineered OEM induced draft blower gasket designed specifically for a secure fit between the induced draft blower assembly and the furnace housing

as an OEM part for the Carrier family

this limit switch protects the heat exchanger and blower motor from overheating conditions

Maxitrol 325-5B-3/4 Regulator Els PW 17895 The shape is strictly forThe Maxitrol 325 5B 3 4 is a high performance gas pressure regulator engineered for pounds to inches reduction in residential, commercial, and industrial gas piping systems. Featuring a robust lever acting design, this 3 4" NPT unit is built with a high leverage valve linkage assembly to ensure positive dead end lockup, essential for protecting downstream components. This model is factory equipped with Imblue Technology, a specialized coating that