To keep blast media out of component interiors, plug the holes first! Abrasive blasting is the most effective way to clean a wide variety of parts, but how do you keep the blasting media out of the component you're cleaning? Use this 54-pc. set of assorted vinyl protector plugs! Protect threads, pipe ends, shafts, etc. Quicker and easier than masking tape For 5/16" to 1-1/2" inside diameters