Magnesium sulfate heptahydrate is also named mgso4.7h20, used in fertilizer,FOB price is 120usd per ton, quality is better, diameter have 1-2mm, 2-3mm .
Model Number: KJ-370M
Key Specifications/Special Features:
This headset is well manufactured with an adjustable microphoneHigh technical quality delivers sound with absolute claritySoft leatherette ear pads provide you with lasting comfortSing...
Model Number: Call Center Headset 2015
Brand Name: OEM / Daily
Key Specifications/Special Features:
Materials: metal, ABS and POM Acoustic shock-circuit protection Professional call center headset for telemarketing, office and various noise en...
Model Number: UC 500B Duo
Key Specifications/Special Features:
Premium design and functionality,Compatible with all major UC platforms,In-line controller with buttons for call control, mute and volume,Compatible with Microsoft Lync system,Hifi...
Model Number: JTY-05
Key Specifications/Special Features:
Model number: JTY-05Appearance model: inner to hear typeColors: black/whiteFunction: answer the phone/listen to musicFrequency responses: 20Hz-20kHzL&Rsensitivity: 100dB ±3dBMicroph...
Model Number: Call Center Headset 2035#1575
Brand Name: Daily
Key Specifications/Special Features:
Hi-Fi audio quality with neodymium speakersStylish plastic mic arm for crystal-clear voice transmissionBreak-resistant free spin boom with 330° sw...
Model Number: BX-105MIC
Brand Name: JINERLE / can be OEM
Key Specifications/Special Features:
Portable call center headsets with clear sound1. With microphone function2. Color optionalPS: configurations can be changed according to customer's req...
Model Number: UC500A Duo
Key Specifications/Special Features:
Diamond shape in ear plate,Compatible with all major UC platforms,In-line controller with buttons for call control, mute and volume,Compatible with Microsoft Lync system,Hifi stereo...
Model Number: Call center headset 2030#6700-#7855
Brand Name: Daily
Key Specifications/Special Features:
Hi-Fi audio quality with neodymium speakersStylish plastic mic arm for crystal-clear voice transmissionBreak-resistant free spin boom with 3...