SNR: 29dB or 33dB (different price) Material: PU and mercerized cotton thread line Length of the line: 60cm Size: 13*24mm Item No. JK13004 SNR 29dB or 33dB (different price) Material PU Size: 13*18mm De-bouncing time: 15-30 seconds or 45-60seconds (different price) Color Yellow, other color required by customer is OK. Standard: Conforms to CE EN-352-2 Ear Plug (JK13005)
