The Diversified Machine O-Ring Style Seal for DMI 2-7/8in Smart Tube is an inner O-ring hub bearing seal constructed from durable rubber. This rear seal measures 3.993 inch OD, 2.985 inch ID, and 0.381 inch thick, precisely fitting DMI 2-7/8 inch steel ring SmartTube applications. The O-ring design provides a reliable barrier against contaminants and fluid leaks.








