Optimal 40 serrations per inch
It is a unique elastomer-modified asphalt base emulsion produced by incorporating the rubber polymer into the asphalt using extreme pressures and temperatures
Polypropylene Top
This kit is used for clothes dryer exhaust venting applications that require moist air and humidity from exiting the home
More color options available to fit any style
Power Pro Metal Screws, Self-Drilling, Hex Head, 1/4-14 x 2.5-In., 22-Ct. Wall Mount Fans Optimal 40 serrations per inchPowerpro, 22 count, 1 4 14 x 2. 5", hex washer head self drilling metal screw, star drive & pro stick bit prevent cam out & increase stability while driving, self drilling tip means no pre drilling, quickly penetrates metal up to 1 8", 11 gauge.