• Easy-to-install hydraulic sealing rings with a secure grip. • Optimal sealing when tightening the screw. • Made with high-quality rubber and metal. • High hardness, oil, acid, and heat resistance. • Durability and airtightness without fear of leaks. • Applicable temperature range: -21 to 120 degrees. • Specially designed for the automotive and hydraulic industry. • Ideal for workshops, craftsmen, and hobbyists. • Flat rubber gaskets in a reusable transparent box. • Separate compartment for easy storage and access. • Material: metal and rubber. • Quantity: 150 units. • Working pressure: 40 MPa/5800 psi (max). • Working medium: oil. • Includes sizes M6 to M24.