HIGH IMAGE&VIDEO QUALITY: This Rifle bore scope produces crisp and clear images at 1280x720 resolution With 1cm-1.5cm short focal length camera and detachable side-view mirror, you can inspect for barrel cleanliness, throat erosion, tool marks, rifling wear, chamber damage and fouling
Ultra-thin Diameter:It comes with 1-meter/3.28-feet Semi-rigid Hard-line and Ultra-fine diameter camera head.Semi-Rigid probe with diameter of 5mm (0.2") to fit 20 Caliber rifle barrel and above,easy to help see the barrel inside. the scope will fit .20 caliber and larger barrels with its 0.2-inch diameter.