The Sonar is a brand new Putter mold in DGA's lineup that is currently only offered in this Swirly Base Blend plastic for their Prototype release! The flight numbers of the Sonar have yet to be finalized but we know that it has a bead on the mold that isn't too big or too small, and that it has a more overstable flight and reliable finish compared to the other new mold, the Surf.
Please understand that despite ours and the manufacturer's best efforts to store and ship discs carefully, scuffs and scratches are still a possibility when ordering baseline plastic.