GAF Master Flow 12 in. Mill Galvanized Steel Internally Braced Dual-Bearing Wind Ventilation Roof Turbine - High Efficiency Attic Vent, Weather-Resistant, Adjustable Base, Heavy-Duty - GIC12

Permanently lubricated track system, upper and lower stainless steel ball bearings prevents metal-to-metal contact, encased to help prevent dirt, dust, sand, and other foreign materials from damaging bearings for long life, less friction, smoother spin, and wear resistance. Heavy-duty steel spider braces and case-hardened steel shaft for long-lasting strength/durability. Simple, mechanically-locked, 2-piece head/base for faster, easier installation. Pre-punched bottom/crimped collar of 1-piece base fits tighter, makes installation easier, and allows for adjustability up to 12/12 pitch without removing turbine. Extra-large flashing and head with included bottom ring for easier installation and better weather protection. Double ribbed vanes, with convex top, direct even wind-driven rain away from the unit. Dade County/Texas Dept. of Insurance Approved.

• Galvanized steel construction provides superior durability and rust resistance.
• Mill finish for a professional look that complements various roof designs.
• Internally braced design enhances wind resistance and structural stability.
• Dual-bearing system with upper and lower steel ball bearings for smooth operation.
• Encased bearings prevent dirt, dust, and debris buildup for maintenance-free use.
• Two-piece, mechanically locked design allows for fast and easy installation.
• Extra-large flashing base offers superior leak protection in harsh weather conditions.
• Adjustable base fits roof pitches from 2:12 to 12:12 for versatile installation.
• 120 sq. in. net free area (NFA) ensures optimal attic ventilation.
• Permanently lubricated track system ensures years of trouble-free spinning.