Our various types of pre-filter pads/rolls combine low initial pressure drop for ideal air velocity in the paint booth. Progressive density media works to extend the life of downdraft ceiling filters. One-inch polyester media with a nylon scrim backing for extra strength and durability. One-inch polyester with non-migrating wet tack provides excellent dust-holding capacity. Available in three different types depending on your conditions. One-inch dry polyester. Available in pads and rolls to meet each spray booth's specifications.