Versatile Application: The M4 Rubber Well Nuts with Brass Inserts and Stainless Steel Screws are essential components for a wide range of applications. These well nuts are particularly effective in sealing holes and isolating vibrations, making them ideal for use in kayaks, small boats, canoes, and various marine environments. They can also be utilized in automotive and household projects where a secure, vibration-dampening connection is needed. Durable Construction: Crafted from high-quality neoprene rubber and featuring brass inserts, these well nuts are designed for longevity and reliability. The accompanying stainless steel screws offer excellent corrosion resistance and sturdy performance, ensuring that your installations remain intact under varying conditions. Their anti-deformation properties further enhance their durability, making them a dependable choice for both professionals and DIY enthusiasts. Specification Color: Black Material: Rubber Stainless Steel Bottom Diameter: 11mm/ 0.43inch Height: 13mm/ 0.49inch Package Includes 12Pcs x M4 Well Nuts 12Pcs x M4*20mm Stainless Steel Pozi Screws - High-quality neoprene rubber and brass construction for durability - Corrosion-resistant stainless steel screws for long-lasting performance - Easy installation into pre-drilled holes for secure mounting - Effective in sealing holes and isolating vibrations in various applications - Ideal for marine use, automotive projects, and general household needs