LL Building GIC12BL GAF 12 Inch Black Galvanized Wind Turbine

Key Features Allows heat and moisture laden air to escape your attic, helping to extend the life of your roof Can be installed virtually on any roof, from 2:12 up to 12:12 pitch Double ribbed vanes, with convex top, direct even wind driven rain away from the unit Exclusive stainless dual bearing system for durable, long lasting smooth and silent operation Turbine ventilators deluxe - internally braced dual bearing system"gaf/master flow" galvanized internal bracing 12 inch diameter finish=black 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, a nd 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-pie