Features: The ball adapter for handlebar clamp mount base offering universal compatibilities for bike and motorcycle phone holders with aluminum alloy construction. Featuring adjustable clamp for 1.5-5.5cm diameters and a reinforced thickened design, this adapter ensures secure, vibration resistant mounting across handlebars, tripods, and railings. Ideal for motorcycle riders, cyclists, outdoor enthusiasts, and photographers seek reliable device stabilization during high motion activity. Perfect for ruggedly terrains, daily commutes, or action photography where stable phone/camera mounting on bikes, motorcycles, or equipment racks is essential. Engineered with a quick tighten knob and corrosion resistant aluminum alloy, this adapter simplifies installation while maintaining robusts performances in diverse environment. Specifications: Applicable to: 17mm base Weight: 155g Features: The clamping surfaces is more suitable for round tubes and is more secure Color: Black Component:aluminium alloy Size: Approx.86x91x20mm Package Includes: 1pcs Motorcycle Handlebar Mount Adapter note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.