Stick with the Best! 🛠️ Utilizes negative fluid pressure for effortless adhesion to nonporous surfaces. 3" diameter and 1" height make it easy to store and transport. Integral brass threading ensures a reliable hold in any environment. Perfect for marine, industrial, and household applications. Crafted from solid neoprene rubber for long-lasting performance. Marine-grade durability 1/4" x 20 TPI thread 3" diameter size The Herco 3" Diameter Heavy Duty Neoprene Female-Threaded Suction Cup is engineered for durability and versatility, featuring a robust neoprene construction and a secure brass threading, making it ideal for a wide range of applications in marine, industrial, and household settings.