this replacement squirrel cage blower is precision-balanced at the factory to eliminate vibration

whereas the CTRD-51 for series 51/53 is grey

How can I tell if my lineflow fan needs replacement

Precision Matching: "Code 1" Match system ensures consistent length and tight tolerances

Browning AX46 Belt 320720-756 this replacement squirrel cage blowerThe Browning AX46 Gripnotch Belt is a heavy duty, cogged V belt engineered for precision power transmission in demanding HVACR environments. With a 48. 2" outside diameter and a standard 1 2" top width, this AX section belt is constructed from high grade EPDM (Ethylene Propylene Diene Monomer), providing an industry leading operating temperature range from 60F to +250F. Unlike standard wrapped belts, the cogged design utilizes precision molded cogs to