PLANTRONICS S11 telephone Headset System, Stock# 65148-11 Software telephone 1-3/8-Inch has a flange stop

1-3/8-Inch has a flange stop that prevents over-drilling

It is forged and heat-treated for long life and for use in 1/4-Inch (6

150 FT (655 m) package of 85 lb

It is For use in 2-1/2-Inch ducts

629 is in size of  1

PLANTRONICS S11 telephone Headset System, Stock# 65148-11 Software telephone 1-3/8-Inch has a flange stopThe versatile PLANTRONICS S11 65148 11 telephone Headset System is a telephone Headset System that has a volume and mute control, a noise canceling microphone, and a headset stand. Features: Noise canceling microphone for business level sound clarity Adjustable over the head headset for all day comfort Call Clarity technology filters phone noise for clear communications Compatible with virtually any single or multi line phone Easily accessible