R-W R400 SERIES HEAVY DUTY ROLLING SERVICE DOOR is produced with the highest quality and durability in the industry. The 400 Series consists of 3” — 24, 22, 20, or 18-gauge slats with a flat, curved, or perforated profile. The 400 Series is available in sizes up to 40’ wide or 30’ high (varies by model). The 400 Series is the perfect choice for industrial, commercial, or high cycle applications.