Fisher 30" Lower Tube with Hardware for Impulse AQ Metal Detector Model_APEX Feature 9" FMF Coil 11" Compatibility Specifically for Jeohunter Feature 9" FMF Coil 11" FMF Coil 13" x 11" FMF Coil Target Separation Excellent Very Good Good Maneuverability Excellent Very Good Moderate Iron Contaminated Sites Excellent Very Good Good Trashy Parks Excellent Very Good Good Woods Tight Areas Excellent Very Good Moderate Ground Coverage Moderate Very Good Excellent Open Fields Very Good Excellent Excellent Beach Hunting Very Good Excellent Excellent Coin Hunting Excellent Excellent Very Good Relic Hunting Excellent Excellent Excellent Depth Potential Very Good Excellent Excellent Swing Weight Lightest Moderate Heaviest Best For Separation High Frequency Elliptical Coil: Equipped with a 9 This 30" lower tube is designed specifically for the Impulse AQ and includes the essential hardware needed to secure the search coil Genuine Fisher Accessory – Sold as a Fisher replacement part through an authorized specialist dealer