Norcold Upper Freezer Door 635645001 (fits the NX6/ NX8 models)Fits these Norcold refrigerator models:NX841 / NXA841 series: NX841, NX841IM, NX841.3, NXA841, NXA841L, NXA841R, NXA841IM, NXA841IMR, NXA841.3, NXA841.3R This is the upper/ freezer door that fits all of the NX and NXA models.