[Pre-lubricated] All our bearings are pre-lubriated for smooth,easy and noiseless spin.
[Double Sealed] Our bearings Shields sealed on both sides keep lubricant in and contaminants out, easuring stable performane and long life
[Bearing Steel Material] Made of high performance bearing steel, these bearings are super durable and highly resistant to rust and corrosion.Compared with other carbon steel bearing, our bearings can spin very cleanly and easily without deformity under heavy loads.