This product is bike bottle holder rack, manufactured with premium material for durable and long-lasting use. The scientific structure design will ensure its practicability and popularity for bottle holding, holding your bottle securely. Suitable for bicycles or mountain bike use. Features - Color: Black. - Material: Aluminium alloy. - Size: About 14.7x8x8cm/5.79x3.15x3.15 inch. - Clamp mouth: suitable for round tube diameter 18-35mm. - for durable and long-lasting use. - Special and scientific design with sturdy structure. - Lightweight for portable carry and easy to install. - Solve the problem that the water bottle will be collided when you ride outdoor. - High strength and high hardness, not easy to deform. Suitable for bicycles or mountain bike use.