The award-winning Goblin Thunder Choke Tube is the original extended ported shotgun choke, designed for superior performance. When matched with the right combination of shell, pellet and choke constriction, the Goblin Thunder reliably delivers a consistent 14 inches to 16 inches pattern at 40 yd. Precision-machined to high tolerance standards using advanced computer-controlled equipment, Goblin Thunder chokes are constructed from 17-4 PH grade stainless steel, ensuring top-tier quality among shotgun chokes available today. With its unique conical/parallel internal design and exclusive outward angled diagonal ports, the Goblin Thunder enhances pattern density by up to 20%. The extended ported section allows for faster follow-up shots and increased accuracy by significantly reducing recoil and muzzle jump. Upgrade your shotgun setup with the Goblin Thunder Choke Tube for unparalleled reliability and performance in any shooting scenario.