This is Myriad part designed to fit TK® applications.
TK S2 & S3 REMOTE EVAPORATORS, TRUCK AND TRAILER, SL/ SLX / SPECTRUM / T-SERIES / UT-RANGE
NOTE: Fans 781718 and 781886 are interchangeable (same installation fit, same current draw range and air flow capacity range). They have separate part numbers for traceability purposes, but dealers can use either for repairs. In Dec 2015 OE's started using 781718 for all S-2 remote evaporators and 781886 for all S-3 remote evaporators in production for all unit models (truck, trailer and cryo).
Refers to OEM part numbers:
781886
78-1886
78-1554
781554
78-1362
781362
78-1718
781718