5pcs Iron Powder Toroid Cores T37 T50 Carbonyl Ferrite Rings Color:T37-2 ✅ Reusable and machine washable

✅ Reusable and machine washable — reduces waste

so you can choose frames that match your existing décor

Easy-to-Use Dropper Bottle: Precision dropper design lets you apply just the right amount

Its bold "30" design shows up beautifully in photos and adds instant fun to any snapshot

wipe with a cloth

5pcs Iron Powder Toroid Cores T37 T50 Carbonyl Ferrite Rings Color:T37-2 ✅ Reusable and machine washable5pcs Carbonyl Iron Powder Toroid Cores T37 6 T37 2 T50 2 T30 2 Upgrade your RF, audio, or power electronics projects with these precision wound carbonyl iron powder toroid cores. Sold in a convenient 5 piece set, these red coated ferrite toroid rings deliver stable, high performance magnetic characteristics across a wide frequency range making them an ideal choice for inductors, filters, chokes, and transformers in amateur radio, DIY electronics, and