4X ExtraCooling Quiet Fans Compatible with Netgear GS724TPS Fan

4X ExtraCooling Quiet Fans Compatible with Netgear GS724TPS Fan??Set of 4x Quiet Version Sunon fans for Netgear ProSafe GS724TPS Switch. ?Condition: New, Bulk ?Model: GS724TPS-FAN ?Quiet! Netgear GS72...