Commodity Margins

Dear All

Where can I get the lot size and margins required for trading various commodities in an excel format ?

Thanks
Amit

Hi
pls find the attached file. I have traded karvy comtrade. I have attached that file

go to ur comm broker web site. there u will find the margin amt. or http://www.karvycomtrade.com/marginFile.aspx go there u will get the lot size and margin amount