Norcold Middle Refrigerator Shelf 632441 (fits the newer N4XX/ N5XX)

Norcold Lower Refrigerator Shelf 632443 (fits the newer N410/ N412/ N500/ N510/ N512) This shelf fits all N5XX models with a serial number above 18721783. N410 N412 N5

Norcold Refrigerator Wire Shelf 632453 (fits the DE0061) This wire shelf fits inside the refrigerator compartment of all DE0061 models with a serial number above 19119379.

Norcold Refrigerator Shelf 635824 (fits the NR740) This is the shelf that goes inside the NR740BB and NR740SS. 

Norcold Middle Shelf 636689 (fits the 2118) This is the middle refrigerator wire shelf that fits on the 2118 models. It fits all models regardless of serial number.

Norcold Upper Refrigerator Shelf 640172 (fits the N10DC models) This is the upper refrigerator shelf. It fits all Norcold N10DC models regardless of serial number.