Sterling Silver Ohm Sign Pendant With 18 inches Black Braided Leather Bolo Cord Necklace and Sterling Silver "Lobster Claw" End Caps. The back plate of this unique pendant is made of Sterling Silver with a high polish finish on which a high polish Ohm Sign has been laser welded. Dimensions: Height: 3/4 inch width: 3/4 inch Weight: 4.5 grams of Sterling Silver. Comes in a collectible black leatherette display box. Our necklace is designed as a short necklace and is available in 17, 18, 19 or 20 inches length. Contact us for the right size.