BL1900 Blender - Blade and (2) Gasket for Black and Decker Includes One (1) Blender Blade and Two (2) Gaskets as pictured Fits the following Black & Decker Models: BL1900, BL3900, BL4900, BL5000, BL5900, BL6000, BL9000 Replacement Blender Cutter Blade for Black and Decker Blenders. Do NOT install beneath the blender blade assembly or between the blade and the plastic base cap - this will result in a leaky jar and poor fit.