uxcell a12022900ux0337 10 Piece Toroid Ring Ferrite Cores 22.5 mm x 13.5 mm x 10 mm: Electronic Component Ferrites: Amazon.com: Industrial & Scientific
IIVVERR 50 x 30 x 19mm Ferrite Ring Iron Toroid Core Black for Power Inductor (50 x 30 x 19 mm Anillo de ferrita Iron Toroid Core Black para Power Inductor - - Amazon.com
Fielect 10 Pcs Toroid Core Ferrite Choke Iron Powder Inductor Ferrite Ring 24.1x46.7x18mm,Light Green and Blue: Amazon.com: Industrial & Scientific
uxcell Toroid Core, Ferrite Chokes Ring Iron Powder Inductor Ferrite Rings, Light Green Blue 10pcs, 21.3 x 38.8 x 11.2mm: Amazon.com: Industrial & Scientific
Xiaoyztan 5 Pcs Iron Toroid Ferrite Core Powder Inductor Ferrite Rings, Green Painted, 1.2"x0.7"x0.5": Amazon.com: Industrial & Scientific