Zacuto ZipGear Universal with Stop has been discontinued, here are some related products you might like:
The Zacuto Universal ZipGear comes with a 13.5-inch adjustable gear and one stop housing. Works on any camera, prime or zoom lens.
To use, just wrap the gear around the lens, cut to size, press on gear locking housing and tighten. Install stop housing to stop at infinity. Installation takes one minute.
More information about Zacuto Products (Link to Zacuto Website)