Gamma Zinken 25mm Accessory Mount Ball w/22 to 25mm clamps - GZ-SM2022550
Versatile 1 inch diameter ball for mounting various accessories.
Clamps to handlebar or crash bar via a clamps that work with 7/8ths (22mm) to 1 inch (25mm) diameter bar.
This works best on non-tapered 7/8th's diameter handlebars like those found on the V7, V7 II, V7 III, and V7 e5 850cc