L L Building Products GC12E "Gaf/Master Flow" Mill Finish Turbine Ventilator 12" Pens & Refills It is also good for

It is also good for cut-off and punchout work

Repairs leaks on wet and dry surfaces

For cleaning and polishing all metals

Electronic pressure control with rapid clean speeds up the flushing and clean-up process

Will not burn out in sand or lime

L L Building Products GC12E "Gaf/Master Flow" Mill Finish Turbine Ventilator 12" Pens & Refills It is also good for"GAF MASTER FLOW" TURBINE VENTILATOR Diameter: 12" Finish: Mill Simple, 2 piece assembly for faster installation. Galvanized construction, externally braced for added strength. Heavy duty construction ideal for coastal and high wind areas. Permanently lubricated dual bearing system for long lasting performance. Stainless steel ball bearings. No. GC12E Dade County Approved 02 0524. 03. Nos. GC12EMF & GC12EWWF Florida Building Code (FBC) Approved FL5027.