Features: The BLALION Motorcycle Cup Holder combines small durability with a foldable, adjustable design, featuring aluminum construction and general compatibility for 18 30mm tubes—ideal for electric bicycles, motorcycles, and ATVs. Engineered with ABS plastic and heat treated aluminum alloy, this water bottle mount offer multi point support, a wind responsive rotating wheel, and effortless installation via two screws and Allen wrench. Perfect for road cyclists, mountain bikers, motorcyclists, and electric bike enthusiasts, it also accommodates strollers, wheelchairs, and fishing gear with its 1.8 3.0cm tube adaptability. Securely holds 8.6cm diameter bottles during long rides, commutes, or outdoor adventures, while its powder coated, polished finish resists scratches and blends seamlessly with glossy vehicle surfaces. Designed for stability on hard terrains or smooth roads, its compact foldable structure and moisture retention convenience make it a must have cycling accessory for active lifestyles. Specifications: Component : Aluminum Size: about 72x98mm/2.83x3.86inch Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1xCup Holder