3x10x4 mm Ceramic Hybrid Orange Seal ABEC 7 Fishing Reel Bearings - 4 Pack Inside Diameter: 3 mm - Outside Diamater: 10 mm - Width: 4 mm Bearing Material: Stainless Steel 440C, Ball Material: Ceramic SI3N4, ABEC#7/ISOP4 Enclosure: Two Seals, Enclosure Material: OS Rubber Seal Retainer Material: Stainless Steel, Radial Play: C3, Lubrication: LD Dry Lube High Performance Fishing Reel Bearing Upgrade