554NEW BIO-Based Formula. Highly effective concentrated paste formula that lasts longer and takes less time to clean with than ordinary liquid or aerosol type cleaners. 

These premium bore brushes are made with a fiber that is cobalt blue in color so it can't be mistaken for any other type brush. 

Fits .22, .243, .30, .38, .40, and Larger Caliber Barrels Compatible with Teslong NTG100 Series Rifle Borescopes NOT compatible with NTG200 Focus & Fold Borescope Improves Visibility in Larger Caliber Barrels See More and Inspect Faster Keeps Your Probe Centered In The Barrel Easily Threads onto NTG Borescopes

USB Design Compatible with Android, Windows PC, or Apple OSX 26-Inch Rigid Borescope Probe Fits .22 Caliber or Larger Barrels LED Ring Light Illuminated Removable Side View Mirror

21.30/.308 caliber

15AngelArms gun cleaning patches are the highest quality, non-fraying, 100% natural fibers, with maximum solvent absorption and cleaning ability.

.30/.308 Caliber Rifle Length

For 9mm Dia, Cartridge Style, Convenient and Accurate, Brass Material

The image quality is first rate and will give you a detailed view of your barrel 

6.25" Wide x 13" Long. 4" tall standard Spacing 3/8", 1/2", 5/8", 3/4", 7/8", 1", or wider. Please specify when ordering. Standard ears with seat belt material. With improved match proven neophrene donut base, wouldn't bulge on the bottom.