Ceramic Hybrid Orange Seal ABEC 7 Fishing Reel Bearing Kit - 2-Pack (3x10x4 and 5x11x4) Inside Diameter: 3 mm - Outside Diameter: 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: Lube Dry High Performance Fishing Reel Bearing Upgrade