Tape Winding Toroid Magnetic Ring Silicon Steel Cores for Electrical Transformers Parts. High Saturation Magnetic Induction: Silicon steel core offers up to 20,000 gauss saturation magnetic induction strength. Customizable Core Dimensions: Custom sizes (d*D*B) available with specific cross-sectional areas and weights. Advanced Rust Prevention: Passivation-based chemical rust prevention forms a dense, long-lasting protective film. OEM/ODM/OPM Services: Experienced R&D team supports personalized services including OEM, ODM, and OPM. ISO9001 Quality Control: Strict ISO9001 process management with regular inspections and comprehensive testing. Versatile Application: Suitable for electronic instruments, sensors, audio, lighting, and energy harvesting. Low Cost & Mass Production: Inexpensive material with excellent magnetoelectric properties suitable for mass production. 100% Finished Product Inspection: Every product undergoes visual and functional inspection before shipment.