Artograph 1530 Pre-Filter Roll, 30" x 50 yards - 225349. Unique roll mounted 100% polyester pre-filter that traps the bulk of the initial spray and provides a continuous clean work surface. To replace, simply pull down the soiled pre-filter and cut off with a pair of scissors. 30" x 50 yards, 100% spun bonded continuous filament polyester. Each sheet provides approximately 90 surface sprays.