Replace a torn, worn through, melted / burned or otherwise damaged particulate bag on your STEELMAN Pneumatic Workshop Vacuum with this replacement bag. Made of tough 65% cotton and 35% Tetoron polyester blended fabric, this particulate catcher has a tight weave that prevents fine powders and dusts from blowing through the bag creating an even bigger mess. The convenient zippered opening along the side makes emptying the bag after cleaning easy without having to fully remove the pouch from the vacuum. Designed for use with the STEELMAN 99978 and 99978-1 Pneumatic Workshop Vacuum and Compressed Air Blower.