"Top quality, advanced seals prevent leakage and keep out dirt. Two set screws to fasten bearing to shaft. Self-aligning. Solid cast housing. Interchangeable with most other makes. Block Size (in.): 1 3/8, Bolt Hole Size (in.): 5/8 x 3/4, Bolt Hole Shape: Oval Center hole: 5in. Thickness of hole: 3/4in."
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