STAINLESS CAT'S EYE TIRE PRESSURE SYSTEM 2 PAK 110 PSI Tire Pressure Equalizer and Tire Pressure Monitor 2 Pack DESCRIPTION This is a set of (2) 110 PSI Cat's eye. With just a glance, dual tire pressures can be checked on efficient walk-arounds with the Cat's Eye tire pressure maintenance system. The Cat's Eye makes it easy to see if your tires are underinflated. This system attaches to the dual's hub or lug bolt and allows air transfer from one tire to the other. Its single airing point fills both tires at once, making the job quick, clean and easy. With just a glance, you'll instantly see changes in tire pressure. The bright yellow “eye” of the Cat's Eye, opens up slightly if dual tire pressure falls 10-15% below the recommended pressure setting. The internal check valve will prevent the good tire from going flat in the case of a tire blowout or a broken pressure hose. Below is a list of basic operating tips for the Cat's Eye tire pressure maintenance system. They can also be found in your Cat's Eye installation instructions 1) The torque limit on the Cat's Eye mounting bolt is 15 ft. lbs. Damage or leakage can occur if mounting bolt is over-tightened. 2) Bubble test to insure correct installation. 3) Valve stems must be in good condition to operate the Cat's Eye. 4) Always insure that hoses are installed with minimal bending or “kinking”. 5) Do not use acid wheel wash. This will void the warranty. 6) When installing new or used tires, the inside of the tire must be clean and free of all materials, including wheel balancing compounds. 7) The Cat's Eye is not recommended for steer axles. BE SAFE AND SAVE MONEY120psi With just a glance, the Cat's Eye TPMS makes it easy to see if your dual tires are under-inflated. Cat's Eye is the only Tire Pressure Monitoring System that ensures tire pressure is equalized between the duals – reducing drag and the chance for a blow out. And with ROI of just 3-6 months, Cat's Eye pays for itself from day one.