On sale! (normally $39) The new redux edition NF-S12B 120mm fans are designed for low impedance case cooling applications and feature an industry grade SSO bearing, an MTBF rating of over 150,000 hours and a 6 year Noctua warranty. The NF-S12B redux are a proven premium choice that provides trusted Noctua quality at an attractive price point. The extra slow 700RPM version is ideal for ultra-low-noise applications and highly noise sensitive users who demand near-silent operation.