Teslong 45in Flexible Rifle Borescope w/HD Screen Black / Blue / Mettalic Grey. This borescope is very useful to monitor the build-up of carbon and copper fouling and to visualize what cleaning products do or dont work well. This borescope is also invaluable for inspecting the barrel of any used firearms you are considering purchasing. Wear rust pitting fire-cracking throat erosion and other defects can easily be seen before you make a purchasing decision. This stand-alone unit is easy to transport to a gun show or shop. Specifications for Teslong 45in Flexible Rifle Borescope w/HD Screen: Manufacturer: Teslong Size: 4.5 in Weight: 3 lb Fabric/Material: Hard Plastic Carbon Punch Size: 6.2 mm Features of Teslong 45in Flexible Rifle Borescope w/HD Screen 4.5-inch Tempered Glass Screen - No App Needed 45-Inch Flexible Fits .22 Caliber or Larger Barrels LED Ring Light Illuminated Removable Side View Mirror Package Contents: Teslong 45in Flexible Rifle Borescope w/HD Screen Teslong TSNTG450: 45in Flexible Rifle Borescope w/HD Screen Black / Blue / Mettalic Grey