Premium Bearing Steel – Made of high-quality bearing steel for exceptional hardness, wear resistance, and long service life Precision Dimensions – 3/4 inch ID, 1-3/8 inch (35 mm) OD, and 1-29/64 inch (37 mm) flange OD ensure a tight, stable fit with standard hubs Deep Groove with Flanged Design – Deep groove ball bearing with smooth raceways for quiet rotation; flanged edge prevents sliding into the hub Sealed and Maintenance-Free – Sealed on both sides to block dust, dirt, and moisture; pre-lubricated with high-speed grease for smooth, maintenance-free use Smooth & Quiet Operation – Low-friction design reduces resistance, ensuring easy, quiet wheel movement during use 1. Upgrade your equipment with this 3/4" bearing kit for reliability and performance. Each pack includes four high-quality bearings made from bearing-grade steel. 2. These bearings fit standard 3/4" axles and are ideal for lawn mowers, wheelbarrows, and garden wagons.