This listing is for one (1) 150 count bag of 16mm ball mounts, of which I have several as can be seen in the photos. These are brand new, individually bagged units in lots of 150-count bags. If you are a retailer of cell phone mounting accessories,  no doubt you know what these are. Adhesive is 3M VHB tape, the industry standard for mounting applications. These are a core component of products I design, of which I have an overstock of these at the moment. This is perfect for sellers of cell phone accessories (retail, swap meet, online store, etc). 

Last 2 photos show the application for this ball mount with the rotating sleeve and tightening/adjustment knob attached. These parts are available in mass quantity as well in a separate listing. The full assembly has many different mounting and attachment possibilities for not just cell phones, but other gadgets as well.