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By certification 
Standard flat bucket teeth
A general purpose tooth with good penetration and wear material
From the hardness of the alloy to the strategically placed wear material, Guannan teeth are made for performance and maximum wear. That means quicker job completion, lower fuel consumption and lower maintenance costs.
Guannan teeth are designed to outfit excavator buckets for any kind of digging conditions, from stiff clay to sharp rock to loose fill.
Bite Off More Than Others Can Chew.
GUANNAN Bucket Teeth are now standard equipment for all New Holland buckets, but their performance is anything but. These factory-installed teeth are built tougher to get into dirt better and designed smarter to get onto your buckets easier. Whether you’re chiseling rock or cutting roots, these teeth are available in a wide range of specialties.
Strong Performance
Armed with heavy, self-sharpening tips, the superior penetration of these bucket teeth leave the competition in the dust. They’re mounted to a square adapter nose for a strong foundation of support. So no matter what you're sinking your teeth into, you'll do more than scratch the surface.
http://www.gnspareparts.com/
