The Fisher and Western 25618 is a genuine base lug O-ring, a crucial hydraulic component for various older model snowplows with cable-operated or electric solenoid power packs. Measuring approximately 1/8 inch by 1-3/8 inches (ID x OD), this AS568-216 standard O-ring creates a critical, leak-proof seal to maintain hydraulic pressure. Made from a durable, fluid-resistant material, it's essential for preventing fluid leaks and ensuring the proper function of your plow's lift and angle systems.