[WITH 2 EXTRA GASKETS] - Leaks are usually caused by wear and tear on high-quality materials. The extra washers keep the happy hands in excellent working condition. a very cost-effective solution. [NO-LEAK] - High-hardness steel clamp plates, lathe-machined port thread, smoother. ensure the happy hands are tightly connected under strong air pressure. The gaskets are made of high-quality rubber, the aging resistance is very strong, effectively prevent air leakage. Works well under long-term weather changes. Gladhands are color-coded red and blue for easy identification. [SIZE & QUANTITY] - Connection size: 1/2 NPT port, dimension: 4.1 inches x 2.2 inches. [WIDELY USED] - Service and emergency (polarized) or universal (non-polarized) configurations. Replace for 1011EF / 1011SF, for Velvac 035042 / 035045, for 278850 / 278851 and so on. Color: Red + Blue Material: Aluminum Package Contents: 2 x Happy Hand Seals 4 x O-Rings Only the above package content, other products are not included.