Coil Weight and Footprint Specs for comparison: ML 6" round:  300 g, 6" wide, ~28 sq in., CWR .02/AWR .093 Coiltek 5x10" elliptical:  426 g, 5" wide, ~39 sq in., CWR .023/AWR .092 ML 11" round:  510 g, 11" wide, ~95 sq in., CWR .022/AWR .186 Coiltek 9x14"elliptical:  880 g (!), 9" wide, ~99 sq in., CWR .016/AWR .112 ML 12x15" elliptical:  660 g, 12" wide, ~141 sq in., CWR .023/AWR .214 Coiltek 15" round:  836 g (note this weighs LESS than the 9x14), 15" wide, ~176 s