Past, Present, and Future 3d ModelRing is ready to be sprued and printed after downloading. Prong height has already been adjusted for normal setting standards and extra thickness has been applied to the shank to allow for shrinkage cleanup. Ring can be set with 1 5mm center stone and 2 4mm side stones. Included in the file is the ring and stone stl files. This allows you to visualize the stone placement and adjust the model to to your jewelers liking. If ordering customized changes