R-4 Rubber Boot: Fits a 40MM spherical OD and is used with Pillow
Block sets such as the 47MPB-ST-ZP, 47PBM-HR-ZP, or 47PBM-SS-N
Manitou R-5 oil-resistant, static-conductive nitrile rubber beari
ng boot designed for ball bearings with a 47 mm spherical outside
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R-6 Rubber Boot: Designed for a 52MM spherical OD and works with
62MPB-ST-ZP, 62PBM-HR-ZP, or 62PBM-SS-N
R-7 Rubber Boot: Fits a 62MM spherical OD and is compatible with
the 72MPB-ST-ZP Pillow Block set