Nokta INV28 11" x 7" Waterproof DD Search Coil for Invenio Metal Detector gold-magic The spiral riffles in the

The spiral riffles in the trommel tube are ¼ inch deep and spaced ¾ inch apart

While many new features and advancements in technology have been introduced since

Dimensions: 18" (L) × 12" (W) × 4" (D)

Edge Dimensions: 7 1/2" Long x 4" Wide

Garrett AT Pro Metal Detector Spring Special with 8

Nokta INV28 11" x 7" Waterproof DD Search Coil for Invenio Metal Detector gold-magic The spiral riffles in theMaximize your treasure hunting success with the Nokta INV28 11" x 7" Waterproof DD Search Coil. Precision engineered by Nokta Detection Technologies, this coil delivers excellent depth and target separation, making it the perfect upgrade or replacement for your Invenio setup. Its fully waterproof design allows you to search confidently in shallow water, wet grass, and rainy conditions. What's Included: 11" x 7" (28cm x 18cm) Waterproof DD Search Coil