New Vitamix Advance Fits For 015990 15990 32 64 oz containers Blender Blade Assembly for Advance Blade Parts numbers： 15990 and 015990 Compatible models:Vitamix Advance replacement parts： 15978, 16016, 15981, and 16019 containers Compatible with: Household 64 and 32 oz containers, standard commercial 64, 48, and 32 oz containers 015990 Incompatible: DOESN'T fit new household low-profile 64 container or 48 ounce container DOESN'T fit commercial MP, XP or XL containers