High Quality Design:This high-performance bearing features inner and outer races machined from hardened stainless steel and polished balls made of premium chrome steel for incredibly smooth, reliable operation even under extreme loads. Excellent Protection : The premium non-contact multi-lip seals made of high performance rubber provide exceptional contamination protection without compromising ease of rotation for superior all-around performance in the most demanding operating conditions. High Durability:Manufactured to meet exceptional international standards, this bearing delivers extraordinary long-lasting durability to withstand continuous use day in and day out in high vibration, high shock environments. Easy Installation : The compact integrated corrosion resistant stainless steel construction allows for quick press fit installation into tight spaces without the need for fastening hardware or bonding agents. Superb Performance : The meticulous hand-finishing and quality craftsmanship provide virtually frictionless, vibration-free and whisper-quiet spinning, making this bearing the smart choice for the most critical industrial equipment where failure is never an acceptable option. XIKE bearing power unlimited transmission