BL451,BL456,Compatible for 7 Fins Extractor Blade Assembly Parts | 7-fin blade assembly fits BL451 & BL456, delivers smooth daily food blending effect

Color: Black + SilverMaterial: PlasticPackaging Contents:1 Knife Holder1 Sealing RingNote: Only the above items are included in the packaging. Other products are not included. ==========

• Seven blades arranged with uneven angular spacing gradually varying from 35 to 55 degrees between adjacent blades, avoiding cutting frequency resonance that generates harmonic noise.
• Tapered flow-guiding cone at the blade disc center throws ingredients outward during high-speed rotation, preventing accumulation directly above the blade head.
• Shaft-to-bearing clearance controlled within 0.02mm, reducing radial runout and extending seal service life.
• Three-layer stacked lip seal with each lip independently deforming to conform, accommodating slight shaft eccentric movement.
• Unloading fillets at blade roots eliminate corner stress concentration, resisting crack initiation under repeated impact.