• Non-drying sticky PBT-32 tackifier
• Heat sealed two stage filter to minimize flutter
• The Series 55 Intake Panel Filter is the Industry Standard in Cross Draft Filters. Often imitated but never duplicated, the Series 55 Filter Line from Viskon-Aire has the unique PBT-32 Tackifier which will NOT DRY OUT OR UNLOAD DIRT. This assures the shop that they will not spoil a great paint finish. Heat sealed two stage filter to minimize flutter and self sealing gasket to prevent bypass.; If your customer is looking for the best filter for the money, it is the Viskon-Aire's Series 55.