ITEM NAME:Ring core transformer 14 mm Internal diameter magnet ring D6G5 Ring core transformer 14 mm Internal diameter magnet ring D6G5 Product name: magnetic core inside diameter: 14mm/0.55" Overall size: 22 x 8mm/0.86" x 0.31" Net Weight: 10g material: metal Color: Black Mainly in winding machine for transformers and other coils Package Contents: 1 x magnetic core Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.