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CO MR 23327 LLB - Enduro Zero, Black-Oxide, Ceramic Hybrid, ABEC-5, Radial Bearing (CN Clearance) - 23mm x 32mm x 7mm TH-873 Precision manufactured of the sameCO MR 23327LB Enduro Zero, Black Oxide, Ceramic Hybrid, ABEC 5, radial Bearing (CN clearance) 23mm x 32mm x 7mm Enduro Zero, Ceramic Hybrid, ABEC 5, radial bearing featuring black oxide treated 52100 high Carbon Chromium alloy races paired with Grade 5 Silicon Nitride Ceramic balls, with dual lip labyrinth (LLB) seals to withstand the outside elements and to contain the 90% fill Mobilux NGLI 2 high pressure water proof synthetic grease. Si3N4 ceramic