Maint Kit-Models 600 600A&600M For Aprilaire -Part# 4839 Manufacturer Name: Aprilaire Product Number: 4839 OEM Part Number: 4839 Product Description: Looking for the best prices on OEM/Replacement Part# 4839, Maint Kit-Models 600 600A&600M for Aprilaire? You've come to the right place. Weight:2.37lbs/1075.01g Choose the best HVAC equipment parts and supplies from PartsHNC!