13" X 15 3/4" platform will fit to all Gitzo tripods.
Reviewed by 2 customers
Excellent to use for mounting your laptop or Ipad type device securely for tethered shooting. Solid construction is obvious in it's design!
Holds 15" macbook pro, need to place rubber feet to avoid sliding, and to raise it just a bit to access the cd drive over the lip. Well made, sturdy, but as others said, expensive.