A perfect blend of form and function, this antenna mounting system by Rupp combine good looks with an innovative design. The 1.5" locking collar holds your antenna securely, yet unlocks conveniently for easy lowering. Made of forged and anodized aluminum for strength and long-lasting reliability. Standard supports are designed for easy mounting to cabin sides. Designed with 4-way oval base. Spacer and bolts not included. Forged and anodized aluminum stays strong Standard supports easily mount to cabin sides | Standard Antenna Mount With 4-Way Base