SL7000 Series SL7550, SL7550e, SL7580, SL7580e, SL7590, SL7590e. SL Series SL1K, SL2K, SL1M, SL300, SL500, SL500e, SL1600, SL2600, SL3500e. [10x]Acoustic Tube Earpiece. Super elastic acoustic tube giving an effortless soft-stretch with head motion.
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