COMMERCIAL DOORS 4000 SERIESRolling Service DoorsAvailable in 22, 20, or 18 Gauge Slats50,000 Cycle SpringsHeavy Duty Cast Iron Gears2-Year Limited Warranty 4100 SeriesInsulated Rolling Service DoorsAvailable in 22, 20, or 18 Gauge Slats22 Gauge Interior Slat50,000 Cycle SpringsGuide Weatherseal2-Year Limited Warranty 4200 SERIESRolling Service Fire DoorsGovernor Control with Lifetime WarrantyFusible Link50,000 Cycle SpringsGuide Weatherseal2-Year Limited warranty 4300 SERIESRolling GrillesSolid Aluminum RodsExtruded Aluminum Guides and Bottom BarCylinder Lock50,000 Cycle Springs2-Year Limited Warranty 4400 SERIESRolling Counter Doors10″ Steel BracketsBox Shaped GuidesTubular Bottom Bar20,000 Cycle springs2-Year Limited Warranty 4500 SERIESRolling Counter Fire DoorsFusible LinkUp to a 3 Hour Fire RatingBox Shaped Steel GuidesTubular Bottom Bar20,000 Cycle springs2-Year Limited warranty 5700 SERIESMedium-duty Service Door