USA Mower Blades (4 BD18BP Low Lift Mulching Blade Replaces Black and Decker 90548199 Length 17 1/2 in. Width 1 3/4 in. Thickness .150 in. Center Hole 1 in. USA Mower Blades manufactures high-quality, OEM replacement lawn mower blades 17 1/2 X 1 3/4 X .150 Center Hole 1" Low Lift Mulching Blade Replaces Black and Decker 90548199 Made in the USA Quantity: 4 Pack