The clear, comfortable earpiece forms to the inside of the ear and is perfect for low-noise environments. It’s made of easy-to-clean, chemically-inert, hypo-allergenic material. Compatible with all Motorola Noise and Surveillance kits.
RLN4764, RLN4764A, RLN4764B, RLN4764C
Works with:  NTN8371A
Other part numbers for small, medium, and large right and left ear piece. (RLN4760A Small Right Ear), (RLN4761A Medium Right Ear), (RLN4762A Large Right Ear), (RLN4763A Small Left Ear), (RLN4764A Medium Left Ear), (RLN4765A Large Left Ear).