Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Knowles: NR-23159-000 NR-25994-D63 NR-25994-000 NR-23158-000 NR-23160-000 NR-30572-000 NR-31155-D63 NR25994-D42 NR-25994-C97