RYOBI 20 in. Replacement Blade is the best solution for replacing your 40V HP 20 in. Brushless Mower's damaged or dull blade. This blade is optimized to provide improved cutting efficiency and increased runtime for your cordless mower. Buy with confidence knowing that this OEM part will work with your RYOBI 40V HP 20 in. Brushless Mower. Replacement part for: RY401170VNM, RY401017BTLVNM, RY401180VNM, and RY401018BTLVNM.