Amazon.com: Miayaya Eargels Earhooks Spare Earbuds with Foam Tube Kit Compatible Model for Plantronics WH500 CS540 W440 CS70 Savi W740 Headset Replacement Tip Ear Loop Small Medium Large Size Durable 1Set :
CS70/CS70N: How to Replace the Ear Tips | Poly, formerly Plantronics & Polycom