This material is Open Game Content, and is licensed for public use under the terms of the  Open Game License v1.0a.

This strange, inter-dimensional device looks just like a portable hole. Anything placed within it is immediately cast to another world—a parallel world, another planet, or a different plane (chosen randomly). If the well is moved, the random factor again comes into play. It can be picked up, folded, or rolled, just as a portable hole can be. Objects from the world the well touches can come through the opening just as easily as from the initiating place. (It is a two-way portal.)

Strong conjuration;  CL 17th; Craft  Wondrous Item, gate; Price 82,000 gp.