Many companies use different sizes and codes to try to conceal from the customer the actual thickness of the net. A general rule is the higher the number the thicker the net. Be careful though, just because one company might call a net the Premier 2000 Series, does not mean it is a stronger net than a #45 twine, (our strongest poly net). A good rule of thumb is to call and ask for a sample. If they will not send a sample, I would be wary.