Norcold Lower Refrigerator Shelf 632443 (fits the newer N4XX/ N5XX)

Norcold Middle Refrigerator Shelf 632441 (fits the newer N410/ N412/ N510/ N512) This shelf fits all N4XX and N5XX models with a serial number above 18721783. N410 N412

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 Lower Shelf 619102 (fits the N300/ N302) This is the lower shelf that fits within the N300 model Norcold refrigerators with a serial number below 18787859. These models include:

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.