This heavy-duty black rubber gasket is designed specifically for jack hammer hose CU couplers, providing a reliable ring seal for your pneumatic equipment connections. The robust construction ensures a tight, secure fit that prevents air leaks and maintains consistent pressure during operation. Perfect for professional construction and demolition work, this gasket helps create an airtight connection between your jack hammer and air hose components. The durable rubber material is engineered to withstand the intense vibration and pressure common in pneumatic tool applications. Compatible with standard CU-style couplers, this ring seal is an essential replacement part for maintaining your jack hammer's optimal performance. The thick, reinforced design helps extend the service life of your air tool connections while preventing costly air pressure losses during operation.