Commercial Duty, One- 3.5 inch Tether = 36 inches expanded. Price is For One Tether Small Cap = 3/8 inside diameter Medium Cap = 11/16 inside diameter Overall length = 7.5 Is for one tether, when it is stuck, it sticks. Non removable. You spend good money on a "White Board" and love to use it for your daily specials. But again, where is the darn dry erase marker. Those pesky markers get lost or taken or miss-placed. Tether It, Don't Loose It! Tether your dry erase marker to your white board or erasable menu board.These 3.5 inch tethers stretch to 36 inches!! Memory coil will coil back to their original size. MADE IN USA. Cap slides on to dry erase caps or barrel end, friction grips and hangs on like Chinese handcuffs. TIP: Markers, cut off cap clasp holder before inserting into cap.Adhesive pad round is 1 1/2, peel and stick it to any smooth, clean, dry surface. NOTE: NON REMOVABLE!Small cap fits markers pens and fine point markers. (see images) For tether caps for which pens or markers. Great for your food counter, deli counter, special boards, hospital rooms, class room, bar and so much more, anywhere there is a white board, there needs to be a dry erase marker tether. Never loose your dry erase marker, pen, pencil or stylist again. Price is for ONE tether. Made in USA