This product is either discontinued or we cannot get that from suppliers.
Poly Plantronics Spare Headband 43298-03, Compatible with CS10, S10, S12, H141, H141N, M170, M175, MX175C, Spare headband for DuoSet Series of headsets.
This Poly/Plantronics Replacement Headband 43298-03 is designed to replace your lost or broken headband for the H141 & H141N, H171, S12, M175C, and the DuoSet Series of Plantronics headsets.