Product description
Round-Metal Hose-Without Adapter-Crystal Head SeatRound-metal hose-without adapter-6p4C crystal head

Application
Can be used in chemical telephones, explosion-proof telephones, coal mine telephones, anti-noise telephones, ship telephones, prison telephones, public ICs, coin-operated telephones, waterproof and dust-proof telephones, self-service terminals and various other communications device.