The Thompson Center U-View Flex Loader is a specialized ball starter designed for .50 caliber muzzleloading firearms featuring innovative viewing capabilities for precise loading.Thompson Center U-View Flex Loader Ball Starter.50 caliber compatibilityU-View design for visual loading confirmationFlex loader construction for enhanced usabilityCompact dimensions: 1.40 x 2.90 x 7.90 inchesSKU: 9053REssential for muzzleloader enthusiasts this ball starter ensures proper seating of projectiles and patches while providing visual feedback during the loading process for improved accuracy and consistency.