S693 Stainless Steel Hybrid Ceramic Bearing – 3×8×4mm, Si3N4 Balls. ABEC-5 / ABEC-7 precision, 30% lighter and 40% stronger than steel balls, high corrosion resistance. Available in ZZ (shielded) or 2RS (sealed) configurations. Pre-lubricated for immediate use. Ideal for fishing reels, RC models (cars, helicopters), 3D printers, micro motors, medical devices, and harsh environment applications where high speed, low friction, and corrosion resistance are critical. Model: S693?2RS Inner Diameter (d): 3 mm Outer Diameter (D): 8 mm Width (B): 4 mm Ring Material: stainless steel Ball Material: Silicon nitride (Si3N4) ceramic

The SMR105 hybrid ceramic bearing features precision stainless steel rings and silicon nitride (Si3N4) ceramic balls, specifically designed for baitcasting and spinning reels. They offer performance advantages that meet the demands of serious anglers. Cast further, retrieve more smoothly, and have greater confidence in fishing. Technical Specifications & Design Features Dimensions: 5mm inner diameter × 10mm outer diameter × 4mm width Ball Material: Silicon nitride (Si3N4) ceramic – lightweight, ultra-hard, and virtually frictionless Race Material: High-grade stainless steel – precision-ground for smooth rotation and dimensional accuracy Cage (Retainer): High-strength nylon or stainless steel – optimized for low friction and consistent ball spacing Shields: Double metal shields (ZZ) or rubber seals (2RS) – prevent debris ingress while allowing easy cleaning and re-lubrication Precision Rating: ABEC-5 or ABEC-7 grade – ensures smooth rolling and minimal vibration during high-speed retrieves