ABEC-3 Radial Bearing featuring 52100 High-Carbon Chromium alloy races paired with grade 10 Balls with 90% fill, high-pressure, water-proof grease.The Enduro line of bearings are available in High-Carbon Chromium Steel, 440C Stainless Steel, Ceramic-Hybrid and XD-15 with Ceramic or Stainless Balls. Our bearings are always engineered with deep groove races to accommodate the largest balls possible. All of our standard bearings feature dual-lip seals that ride in a micro groove creating a full labyrinth to provide ultimate protection against the elements.Bearing Code: MR 2437Dimensions: 24 x 37 x 7mmABEC: 3 Grade: 10Seals: LLBGrease: Mobile HP 222Application: Bottom Brackets