• One pair of Black Foam Ear Cushions
• Measure approximately 2 1/4 " diameter - check photos 
• For F100/F200, ADP I/II
• Can use on UC Voice 150
• Dense foam is stretchable to about 2 3/4" to 3"
• Can fit various other models of telephone headsets from various manufactures, measure ear plate on your headset to check fit.
• Please contact us with any questions regarding compatability