G3 Onyx Mounting Plates. Used but fully functional and in good condition. Will work for the G3 Ruby as well. All hardware included. Retails for about $60 and is discontinued by G3. Hard to find so this may be the last set you ever see! G3’s innovative ONYX mounting plate system allows for 33mm of easy adjustment to fit a wide range of boot sizes. The sliding system in both the toe and the heel, enables the maintenance of boot center, securing the highest ski performance possible. The ONYX sliding plate system also allows for quick binding dismount for easy packing or easy swapping of bindings to multiple pairs of skis.