Eaton bag description PEMU-250-P01Z-50 describes a polyester multifilament SENTINEL bag with a Santoprene ring. It is a 250 micron size 01 bag that comes in box quantities of 50. This bypass-free constructed bag is made using silicone-free materials and is resistant to a range of chemicals. That makes it ideal for a number of industrial uses like chemical processing, wastewater, lubricants, and more.