A single replacement ZR02 Full Ceramic ABU Worm Drive Bearing which fits a range of ABU models. Unlike stainless steel bearings full ceramics do not corrode and are quiet and long lasting. They are oiled with light oil and will still need occasional cleaning and re-oiling to keep them free of grit and dirt.
Replaces ABU Part Nos 21705, 21688 and 21680.
Single bearing only.