Yuhuan Huaerna Hardware Products Factory makes various CNC machining ,CNC milling ,CNC machining &milling parts, especially the radiator series ,automobile parts ,and aero accessories ,and etc. the ma...
Size of each ear plug: 24mm x 14 mm diam and 0.9 cm on the top
SNR: 33 DB CE Standard for European market.
NRR: 29 DB ANSI Standard for U.S. market
Meets ANSI S3.15, CE EN3...
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