12-inch Tube Length: Premium gimbal mount with 1-1/2-inch outer diameter tube provides extended reach and secure downrigger mounting in flush rod holders 316-Grade Stainless Steel: Marine-grade stainless construction delivers superior corrosion protection for demanding saltwater fishing applications 30-degrees Flush Mount Compatible: Designed to mount downriggers in standard 30-degree flush mount rod holders for space-saving installation Tournament-Grade Durability: Heavy-duty construction withstands rigors of professional fishing and rough water conditions for lasting reliability Extended Height Design: Additional 3 inches of height compared to 9-inch model provides extra clearance for larger downriggers or deeper gunwales Includes 12" stainless steel gimbal mount 316-grade stainless steel