grips - with/without flange ?

wondering what this term means? I've seen that in the uber-pimped up way I can get the green grips to match the pedals I want but I don't know which option to get. flange/without flange.
Start Weight 18st 13lbs March 2009
17st 10lbs August 2009
17st 4lbs October 2009
15st 12lbs December 2010
Final planned weight 12st 7lbs
17st 10lbs August 2009
17st 4lbs October 2009
15st 12lbs December 2010
Final planned weight 12st 7lbs
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look quite smart, but more suited to SS bikes.
17st 10lbs August 2009
17st 4lbs October 2009
15st 12lbs December 2010
Final planned weight 12st 7lbs