Brand new and sealed. x2 MRA 2437 LLB bearings and x4 SEMR 2437 seals. Genuine Enduro bearings. Inner Diameter x Outer Diameter x Depth: 24 x 37 x 7mm Used on: Bottom Brackets Precision Tolerance: ABEC3 Ball Roundness : Grade 10 Seals: LLB Grease: Low friction, temperature stable grease Material: 52100 High Carbon Chromium Alloy Races