The Teslong NTG500H is a professional-grade rifle borescope featuring a rigid 26-inch insertion tube and a large 5-inch IPS display screen for detailed barrel inspection and maintenance.Teslong NTG500H Rifle Borescope26-inch rigid insertion tube for deep barrel inspection5-inch IPS screen for clear high-resolution viewingProfessional borescope designed specifically for firearmsUPC: 850034851143Essential for gunsmiths hunters and shooting enthusiasts who need to inspect rifle barrels for fouling damage or wear to maintain optimal accuracy and performance.