The Hoppe’s No. 9 Conversion Adapter Knob End .30 Caliber is a gun cleaning supply designed for lubrication purposes. Made of black plastic, this adapter features a knob end for easier handling during cleaning. Specifically designed for .30 caliber rifles, this adapter is a must-have for gun enthusiasts looking to properly maintain their firearms. Proudly manufactured in the USA, this product ensures quality and reliability for all your gun maintenance needs.