This is a Birchwood Casey Cloth known as the Gun Scrubber Wipes, model BC-33312.
Since 1948" serious shooters" avid collectors and professional gunsmiths have relied on Birchwood Casey for shooting and gun care products that have stood the test of time. Birchwood Casey has pioneered innovative products with an unwavering dedication for quality.
Features:
No Residue
Dries Fast
Dissolves Grease and Oil Quickly