Manfrotto Tripod Dolly Wheels
Universal wheels for Tripods
Lets your camera travel with you across smooth surfaces for super smooth moving shots. A nice tool if your location has good surfaces. Set up time is incredilby short, so you can get that great moving shot, right away!
Folding, triangular dolly attaches easily to bottom of tripod to allow tripod to roll around. Can be used for simple travelling shots over smooth surfaces.