The Agrifac 8257576 Cup Seal PB18H 31418 is a genuine OEM replacement part, crafted from durable NBR (Nitrile Butadiene Rubber) for reliable sealing performance. This black cup seal features an outer diameter of 31.4 mm, an inner diameter of 18 mm, and a height of 10 mm, ensuring a precise fit in various agricultural machinery applications. It is cross-referenced with multiple OEM brands including Amazone, Hardi, Lemken, Rau, Sulky, and Vicon, indicating its widespread use as a critical sealing component.