This base provides a stable foundation for outdoor umbrellas on patios, terraces, balconies, in gardens and other outdoor areas. Made from natural granite and a stainless steel tube, the heavy design ensures that the umbrellas remain securely in place even in windy conditions. Thanks to weather-resistant materials and an adjustable locking system, it is ideal for long-term outdoor use. Material composition: Made from natural granite and a support tube made of stainless steel, this umbrella base offers a robust and stable construction for supporting outdoor umbrellas. The stainless steel tube securely holds the umbrella stem, while the solid granite base provides additional weight and stability for daily outdoor use. Weather-resistant polished surface: The polished granite surface is designed for regular outdoor use and for changing weather conditions. The surface ensures a fine appearance and helps to reduce visible wear and tear in everyday use. Adjustable locking knobs: The support tube made of stainless steel has two hand-adjustable knobs that help to secure the umbrella stem. This adjustable design improves stability and is compatible with compatible umbrella stem diameters. Easy installation: The simple structural design allows for easy assembly by attaching the support tube to the granite base. After assembly, the umbrella stem can be inserted and secured with the integrated locking knobs without the need for special tools. Easy care: The polished granite and stainless steel surfaces require only basic care to maintain their appearance. Regular dust, dirt and water stains can be removed as needed with a soft, damp cloth.