The Av is of what we manufacture. They are vacuummounts that can go on any smooth non-porous surface. You can use them with your camera, GPS, or spotting scope, fish finder as well as many other things. They can be found at www.vacuummounts.com There are some cool videos that have been taken with them there. One is on the side of a helicopter in Iraq. Another is from the bottom of a wind surf board. They act as a shock absorber, so your equipment does not get shaken apart, as happens with hard mounts.