The Fish Hawk X4/X4D Probe O-Ring Set helps anglers keep their probe sealed and functioning properly when trolling for salmon, trout, or walleye in deep water. This replacement set includes two rings-one thinner ring that fits around the probe's groove and one thicker ring that fits inside the groove cap-so you can maintain a watertight seal and protect your electronics on every trip. Maintains a watertight seal to protect probe performance Includes one thin O-ring for the probe groove Includes one thick O-ring for the groove cap Quantity per pack: 2 Made in the USA